./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:56:29,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:56:29,437 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:56:29,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:56:29,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:56:29,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:56:29,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:56:29,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:56:29,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:56:29,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:56:29,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:56:29,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:56:29,490 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:56:29,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:56:29,492 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:56:29,492 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:56:29,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:56:29,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:56:29,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:56:29,495 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:56:29,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:56:29,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:56:29,497 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:56:29,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:56:29,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:56:29,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:56:29,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:56:29,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:56:29,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:56:29,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:56:29,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:56:29,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:56:29,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:56:29,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:56:29,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:56:29,506 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:56:29,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:56:29,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:56:29,515 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:56:29,516 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2023-11-06 22:56:29,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:56:29,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:56:29,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:56:29,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:56:29,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:56:29,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-06 22:56:33,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:56:33,421 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:56:33,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-06 22:56:33,435 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/d2d4db962/ae0ee3a44f184ff0b7d2de0754dcc7ec/FLAGdb02ef4a8 [2023-11-06 22:56:33,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/d2d4db962/ae0ee3a44f184ff0b7d2de0754dcc7ec [2023-11-06 22:56:33,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:56:33,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:56:33,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:56:33,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:56:33,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:56:33,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c264df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33, skipping insertion in model container [2023-11-06 22:56:33,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,500 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:56:33,734 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-11-06 22:56:33,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:56:33,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:56:33,787 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-11-06 22:56:33,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:56:33,813 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:56:33,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33 WrapperNode [2023-11-06 22:56:33,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:56:33,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:56:33,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:56:33,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:56:33,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,874 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-06 22:56:33,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:56:33,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:56:33,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:56:33,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:56:33,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,912 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:56:33,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:56:33,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:56:33,961 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:56:33,962 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2023-11-06 22:56:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:56:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:34,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:56:34,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:56:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:56:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:56:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:56:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:56:34,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:56:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:56:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:56:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:56:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:56:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:56:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:56:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:56:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:56:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:56:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:56:34,058 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 22:56:34,180 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:56:34,182 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:56:34,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:56:34,521 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:56:34,521 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:56:34,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:34 BoogieIcfgContainer [2023-11-06 22:56:34,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:56:34,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:56:34,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:56:34,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:56:34,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:33" (1/3) ... [2023-11-06 22:56:34,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16adf5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:34, skipping insertion in model container [2023-11-06 22:56:34,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (2/3) ... [2023-11-06 22:56:34,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16adf5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:34, skipping insertion in model container [2023-11-06 22:56:34,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:34" (3/3) ... [2023-11-06 22:56:34,543 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-11-06 22:56:34,556 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:56:34,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:56:34,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:56:34,569 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:56:34,716 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:56:34,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 163 transitions, 347 flow [2023-11-06 22:56:34,899 INFO L124 PetriNetUnfolderBase]: 12/160 cut-off events. [2023-11-06 22:56:34,899 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:56:34,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 160 events. 12/160 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 113 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-11-06 22:56:34,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 163 transitions, 347 flow [2023-11-06 22:56:34,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 149 transitions, 316 flow [2023-11-06 22:56:34,931 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:56:34,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 149 transitions, 316 flow [2023-11-06 22:56:34,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 149 transitions, 316 flow [2023-11-06 22:56:34,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 149 transitions, 316 flow [2023-11-06 22:56:35,049 INFO L124 PetriNetUnfolderBase]: 12/149 cut-off events. [2023-11-06 22:56:35,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:56:35,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 12/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 112 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-11-06 22:56:35,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 1950 [2023-11-06 22:56:41,426 INFO L134 LiptonReduction]: Checked pairs total: 2019 [2023-11-06 22:56:41,427 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-11-06 22:56:41,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:56:41,450 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;@295c9bfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:56:41,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:56:41,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:56:41,458 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 22:56:41,458 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:56:41,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:41,459 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] [2023-11-06 22:56:41,460 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 22:56:41,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -626293016, now seen corresponding path program 1 times [2023-11-06 22:56:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:41,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735516475] [2023-11-06 22:56:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:41,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:42,271 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 22:56:42,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:42,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735516475] [2023-11-06 22:56:42,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735516475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:42,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:42,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:56:42,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806840197] [2023-11-06 22:56:42,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:42,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:56:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:56:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:56:42,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 315 [2023-11-06 22:56:42,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 22:56:42,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:42,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 315 [2023-11-06 22:56:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:42,565 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-11-06 22:56:42,566 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-06 22:56:42,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1602 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 22:56:42,580 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-11-06 22:56:42,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-11-06 22:56:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:56:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:56:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-11-06 22:56:42,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005291005291005 [2023-11-06 22:56:42,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-11-06 22:56:42,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-11-06 22:56:42,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:42,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-11-06 22:56:42,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 22:56:42,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 22:56:42,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 22:56:42,643 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 473 transitions. [2023-11-06 22:56:42,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-11-06 22:56:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:56:42,654 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-06 22:56:42,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-06 22:56:42,662 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-06 22:56:42,662 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-06 22:56:42,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 22:56:42,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:42,664 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 22:56:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:56:42,665 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 22:56:42,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1613902094, now seen corresponding path program 1 times [2023-11-06 22:56:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690189498] [2023-11-06 22:56:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:42,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690189498] [2023-11-06 22:56:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690189498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:42,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:42,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:56:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018629649] [2023-11-06 22:56:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:42,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:56:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 315 [2023-11-06 22:56:43,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 22:56:43,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:43,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 315 [2023-11-06 22:56:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:43,290 INFO L124 PetriNetUnfolderBase]: 615/925 cut-off events. [2023-11-06 22:56:43,290 INFO L125 PetriNetUnfolderBase]: For 258/261 co-relation queries the response was YES. [2023-11-06 22:56:43,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 925 events. 615/925 cut-off events. For 258/261 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3881 event pairs, 281 based on Foata normal form. 34/938 useless extension candidates. Maximal degree in co-relation 490. Up to 484 conditions per place. [2023-11-06 22:56:43,300 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-06 22:56:43,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-11-06 22:56:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:56:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:56:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-11-06 22:56:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46476190476190476 [2023-11-06 22:56:43,306 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-11-06 22:56:43,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-11-06 22:56:43,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:43,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-11-06 22:56:43,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 22:56:43,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:43,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:43,322 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 732 transitions. [2023-11-06 22:56:43,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-11-06 22:56:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:43,326 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-11-06 22:56:43,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-06 22:56:43,329 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-06 22:56:43,329 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-11-06 22:56:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 22:56:43,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:43,336 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 22:56:43,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:56:43,337 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 22:56:43,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2101868410, now seen corresponding path program 1 times [2023-11-06 22:56:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:43,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348115505] [2023-11-06 22:56:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:43,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348115505] [2023-11-06 22:56:43,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348115505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:43,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:43,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:56:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428220288] [2023-11-06 22:56:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:56:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 315 [2023-11-06 22:56:43,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 22:56:43,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:43,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 315 [2023-11-06 22:56:43,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:43,824 INFO L124 PetriNetUnfolderBase]: 481/751 cut-off events. [2023-11-06 22:56:43,824 INFO L125 PetriNetUnfolderBase]: For 508/568 co-relation queries the response was YES. [2023-11-06 22:56:43,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 751 events. 481/751 cut-off events. For 508/568 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3161 event pairs, 229 based on Foata normal form. 88/827 useless extension candidates. Maximal degree in co-relation 1294. Up to 486 conditions per place. [2023-11-06 22:56:43,833 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 49 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-11-06 22:56:43,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 296 flow [2023-11-06 22:56:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:56:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:56:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-11-06 22:56:43,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-11-06 22:56:43,838 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-11-06 22:56:43,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-11-06 22:56:43,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:43,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-11-06 22:56:43,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states 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 22:56:43,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:43,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:43,849 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 725 transitions. [2023-11-06 22:56:43,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 296 flow [2023-11-06 22:56:43,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:43,853 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-11-06 22:56:43,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-06 22:56:43,855 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-06 22:56:43,859 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-11-06 22:56:43,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 22:56:43,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:43,861 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 22:56:43,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:56:43,861 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 22:56:43,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2135485292, now seen corresponding path program 1 times [2023-11-06 22:56:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:43,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338076459] [2023-11-06 22:56:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338076459] [2023-11-06 22:56:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338076459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:56:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250266963] [2023-11-06 22:56:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:56:44,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 315 [2023-11-06 22:56:44,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 22:56:44,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:44,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 315 [2023-11-06 22:56:44,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:44,298 INFO L124 PetriNetUnfolderBase]: 419/637 cut-off events. [2023-11-06 22:56:44,298 INFO L125 PetriNetUnfolderBase]: For 721/793 co-relation queries the response was YES. [2023-11-06 22:56:44,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1860 conditions, 637 events. 419/637 cut-off events. For 721/793 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2459 event pairs, 223 based on Foata normal form. 86/711 useless extension candidates. Maximal degree in co-relation 1518. Up to 517 conditions per place. [2023-11-06 22:56:44,305 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 24 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-11-06 22:56:44,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 291 flow [2023-11-06 22:56:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:56:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:56:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-11-06 22:56:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552380952380952 [2023-11-06 22:56:44,310 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-11-06 22:56:44,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-11-06 22:56:44,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:44,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-11-06 22:56:44,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:44,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:44,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:44,319 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 717 transitions. [2023-11-06 22:56:44,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 291 flow [2023-11-06 22:56:44,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:56:44,323 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-11-06 22:56:44,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-06 22:56:44,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-11-06 22:56:44,325 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-11-06 22:56:44,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 22:56:44,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:44,326 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 22:56:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:56:44,327 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 22:56:44,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash 984640893, now seen corresponding path program 1 times [2023-11-06 22:56:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765171994] [2023-11-06 22:56:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:44,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:44,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765171994] [2023-11-06 22:56:44,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765171994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:44,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658465082] [2023-11-06 22:56:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:44,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:44,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:44,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:44,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:56:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:44,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:56:44,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:44,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658465082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:44,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:56:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856684922] [2023-11-06 22:56:44,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:44,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:56:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:56:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:56:45,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-06 22:56:45,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 13 states, 13 states have (on average 128.69230769230768) internal successors, (1673), 13 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states 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 22:56:45,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:45,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-06 22:56:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:45,661 INFO L124 PetriNetUnfolderBase]: 544/799 cut-off events. [2023-11-06 22:56:45,661 INFO L125 PetriNetUnfolderBase]: For 789/789 co-relation queries the response was YES. [2023-11-06 22:56:45,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 799 events. 544/799 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3031 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2433. Up to 408 conditions per place. [2023-11-06 22:56:45,670 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 57 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-11-06 22:56:45,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 396 flow [2023-11-06 22:56:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:56:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:56:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1067 transitions. [2023-11-06 22:56:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234126984126984 [2023-11-06 22:56:45,675 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1067 transitions. [2023-11-06 22:56:45,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1067 transitions. [2023-11-06 22:56:45,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:45,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1067 transitions. [2023-11-06 22:56:45,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.375) internal successors, (1067), 8 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states 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 22:56:45,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:56:45,730 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:56:45,730 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 8 states and 1067 transitions. [2023-11-06 22:56:45,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 396 flow [2023-11-06 22:56:45,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 334 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-11-06 22:56:45,742 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 143 flow [2023-11-06 22:56:45,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=143, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-06 22:56:45,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-06 22:56:45,745 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 143 flow [2023-11-06 22:56:45,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 128.69230769230768) internal successors, (1673), 13 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states 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 22:56:45,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:45,747 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 22:56:45,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:45,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:45,958 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 22:56:45,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash 485245885, now seen corresponding path program 2 times [2023-11-06 22:56:45,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:45,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202969477] [2023-11-06 22:56:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:45,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:46,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202969477] [2023-11-06 22:56:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202969477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:46,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650638310] [2023-11-06 22:56:46,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:46,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:46,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:46,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:46,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:56:46,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:46,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:46,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:56:46,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:46,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650638310] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-11-06 22:56:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682507775] [2023-11-06 22:56:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:56:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:56:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:56:46,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-06 22:56:46,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:46,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-06 22:56:46,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:46,967 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2023-11-06 22:56:46,967 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2023-11-06 22:56:46,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 1083 events. 736/1083 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4358 event pairs, 221 based on Foata normal form. 12/1093 useless extension candidates. Maximal degree in co-relation 3278. Up to 648 conditions per place. [2023-11-06 22:56:46,980 INFO L140 encePairwiseOnDemand]: 307/315 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-11-06 22:56:46,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-11-06 22:56:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 937 transitions. [2023-11-06 22:56:46,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249433106575964 [2023-11-06 22:56:46,989 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 937 transitions. [2023-11-06 22:56:46,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 937 transitions. [2023-11-06 22:56:46,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:46,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 937 transitions. [2023-11-06 22:56:46,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 22:56:47,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:47,003 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:47,003 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 143 flow. Second operand 7 states and 937 transitions. [2023-11-06 22:56:47,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-11-06 22:56:47,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-06 22:56:47,010 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-11-06 22:56:47,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-06 22:56:47,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-06 22:56:47,014 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-11-06 22:56:47,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:47,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:47,015 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 22:56:47,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:47,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:47,223 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 22:56:47,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1509398897, now seen corresponding path program 3 times [2023-11-06 22:56:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:47,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375427885] [2023-11-06 22:56:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:47,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:47,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375427885] [2023-11-06 22:56:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375427885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317838440] [2023-11-06 22:56:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:56:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:47,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:47,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:56:47,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:56:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:47,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:56:47,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:47,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317838440] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:47,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-06 22:56:47,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186128114] [2023-11-06 22:56:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:56:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:56:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:56:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-06 22:56:48,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:48,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:48,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-06 22:56:48,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:48,296 INFO L124 PetriNetUnfolderBase]: 840/1246 cut-off events. [2023-11-06 22:56:48,296 INFO L125 PetriNetUnfolderBase]: For 2272/2272 co-relation queries the response was YES. [2023-11-06 22:56:48,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 1246 events. 840/1246 cut-off events. For 2272/2272 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5188 event pairs, 307 based on Foata normal form. 16/1260 useless extension candidates. Maximal degree in co-relation 4355. Up to 903 conditions per place. [2023-11-06 22:56:48,308 INFO L140 encePairwiseOnDemand]: 307/315 looper letters, 58 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-11-06 22:56:48,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 529 flow [2023-11-06 22:56:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 938 transitions. [2023-11-06 22:56:48,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2023-11-06 22:56:48,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 938 transitions. [2023-11-06 22:56:48,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 938 transitions. [2023-11-06 22:56:48,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:48,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 938 transitions. [2023-11-06 22:56:48,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 22:56:48,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:48,322 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:48,322 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 938 transitions. [2023-11-06 22:56:48,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 529 flow [2023-11-06 22:56:48,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 488 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-06 22:56:48,330 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 297 flow [2023-11-06 22:56:48,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-06 22:56:48,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-11-06 22:56:48,331 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 297 flow [2023-11-06 22:56:48,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:48,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:48,332 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 22:56:48,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:48,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:56:48,538 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 22:56:48,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash -975674031, now seen corresponding path program 4 times [2023-11-06 22:56:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:48,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046981934] [2023-11-06 22:56:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:48,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:48,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046981934] [2023-11-06 22:56:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046981934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648573554] [2023-11-06 22:56:48,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:56:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:48,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:48,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:56:48,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:56:48,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:48,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:56:48,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:48,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:49,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648573554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:49,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:49,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:56:49,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823647224] [2023-11-06 22:56:49,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:49,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:56:49,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:56:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:49,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 315 [2023-11-06 22:56:49,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 124.57142857142857) internal successors, (1744), 14 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 22:56:49,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:49,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 315 [2023-11-06 22:56:49,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:50,196 INFO L124 PetriNetUnfolderBase]: 869/1312 cut-off events. [2023-11-06 22:56:50,196 INFO L125 PetriNetUnfolderBase]: For 3579/3579 co-relation queries the response was YES. [2023-11-06 22:56:50,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5095 conditions, 1312 events. 869/1312 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5268 event pairs, 166 based on Foata normal form. 18/1330 useless extension candidates. Maximal degree in co-relation 5066. Up to 459 conditions per place. [2023-11-06 22:56:50,210 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 104 selfloop transitions, 71 changer transitions 0/175 dead transitions. [2023-11-06 22:56:50,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 175 transitions, 1384 flow [2023-11-06 22:56:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:56:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:56:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2318 transitions. [2023-11-06 22:56:50,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088183421516755 [2023-11-06 22:56:50,222 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2318 transitions. [2023-11-06 22:56:50,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2318 transitions. [2023-11-06 22:56:50,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:50,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2318 transitions. [2023-11-06 22:56:50,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states 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 22:56:50,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 315.0) internal successors, (5985), 19 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states 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 22:56:50,247 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 315.0) internal successors, (5985), 19 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states 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 22:56:50,247 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 297 flow. Second operand 18 states and 2318 transitions. [2023-11-06 22:56:50,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 175 transitions, 1384 flow [2023-11-06 22:56:50,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 175 transitions, 1264 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-06 22:56:50,267 INFO L231 Difference]: Finished difference. Result has 65 places, 100 transitions, 834 flow [2023-11-06 22:56:50,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=834, PETRI_PLACES=65, PETRI_TRANSITIONS=100} [2023-11-06 22:56:50,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-11-06 22:56:50,271 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 100 transitions, 834 flow [2023-11-06 22:56:50,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.57142857142857) internal successors, (1744), 14 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 22:56:50,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:50,273 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 22:56:50,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:56:50,480 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 22:56:50,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -573002309, now seen corresponding path program 5 times [2023-11-06 22:56:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044672086] [2023-11-06 22:56:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044672086] [2023-11-06 22:56:50,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044672086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034342603] [2023-11-06 22:56:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:56:50,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:50,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:50,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:56:50,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:50,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:56:50,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:50,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:50,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034342603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:50,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:50,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-06 22:56:50,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664688770] [2023-11-06 22:56:50,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:50,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:56:50,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:56:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 315 [2023-11-06 22:56:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 100 transitions, 834 flow. Second operand has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states 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 22:56:51,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:51,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 315 [2023-11-06 22:56:51,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:52,005 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-11-06 22:56:52,005 INFO L125 PetriNetUnfolderBase]: For 3790/3790 co-relation queries the response was YES. [2023-11-06 22:56:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5455 conditions, 1272 events. 850/1272 cut-off events. For 3790/3790 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4995 event pairs, 208 based on Foata normal form. 14/1286 useless extension candidates. Maximal degree in co-relation 5423. Up to 624 conditions per place. [2023-11-06 22:56:52,018 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 87 selfloop transitions, 74 changer transitions 0/161 dead transitions. [2023-11-06 22:56:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 161 transitions, 1407 flow [2023-11-06 22:56:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:56:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:56:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1693 transitions. [2023-11-06 22:56:52,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134310134310134 [2023-11-06 22:56:52,026 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1693 transitions. [2023-11-06 22:56:52,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1693 transitions. [2023-11-06 22:56:52,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:52,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1693 transitions. [2023-11-06 22:56:52,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 130.23076923076923) internal successors, (1693), 13 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 22:56:52,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 315.0) internal successors, (4410), 14 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states 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 22:56:52,043 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 315.0) internal successors, (4410), 14 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states 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 22:56:52,044 INFO L175 Difference]: Start difference. First operand has 65 places, 100 transitions, 834 flow. Second operand 13 states and 1693 transitions. [2023-11-06 22:56:52,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 161 transitions, 1407 flow [2023-11-06 22:56:52,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 161 transitions, 1270 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-11-06 22:56:52,071 INFO L231 Difference]: Finished difference. Result has 74 places, 118 transitions, 983 flow [2023-11-06 22:56:52,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=983, PETRI_PLACES=74, PETRI_TRANSITIONS=118} [2023-11-06 22:56:52,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-11-06 22:56:52,073 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 118 transitions, 983 flow [2023-11-06 22:56:52,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states 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 22:56:52,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:52,075 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 22:56:52,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:56:52,285 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 22:56:52,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1092112637, now seen corresponding path program 6 times [2023-11-06 22:56:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:52,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712987816] [2023-11-06 22:56:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712987816] [2023-11-06 22:56:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712987816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831037660] [2023-11-06 22:56:52,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:56:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:52,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:52,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:56:52,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:56:52,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:52,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:56:52,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:52,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831037660] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:52,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-06 22:56:52,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501247644] [2023-11-06 22:56:52,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:52,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:56:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:56:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:56:52,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-11-06 22:56:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 118 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-11-06 22:56:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:53,367 INFO L124 PetriNetUnfolderBase]: 806/1202 cut-off events. [2023-11-06 22:56:53,368 INFO L125 PetriNetUnfolderBase]: For 4045/4045 co-relation queries the response was YES. [2023-11-06 22:56:53,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5344 conditions, 1202 events. 806/1202 cut-off events. For 4045/4045 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4690 event pairs, 167 based on Foata normal form. 14/1214 useless extension candidates. Maximal degree in co-relation 5310. Up to 656 conditions per place. [2023-11-06 22:56:53,382 INFO L140 encePairwiseOnDemand]: 307/315 looper letters, 78 selfloop transitions, 50 changer transitions 0/138 dead transitions. [2023-11-06 22:56:53,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 138 transitions, 1279 flow [2023-11-06 22:56:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 938 transitions. [2023-11-06 22:56:53,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2023-11-06 22:56:53,387 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 938 transitions. [2023-11-06 22:56:53,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 938 transitions. [2023-11-06 22:56:53,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:53,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 938 transitions. [2023-11-06 22:56:53,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 22:56:53,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:53,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 22:56:53,397 INFO L175 Difference]: Start difference. First operand has 74 places, 118 transitions, 983 flow. Second operand 7 states and 938 transitions. [2023-11-06 22:56:53,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 138 transitions, 1279 flow [2023-11-06 22:56:53,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 138 transitions, 1198 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:56:53,418 INFO L231 Difference]: Finished difference. Result has 73 places, 114 transitions, 966 flow [2023-11-06 22:56:53,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=73, PETRI_TRANSITIONS=114} [2023-11-06 22:56:53,419 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-11-06 22:56:53,420 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 114 transitions, 966 flow [2023-11-06 22:56:53,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:53,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:53,421 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 22:56:53,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:56:53,633 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 22:56:53,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1034355259, now seen corresponding path program 1 times [2023-11-06 22:56:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970390552] [2023-11-06 22:56:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:53,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970390552] [2023-11-06 22:56:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970390552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:53,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841210639] [2023-11-06 22:56:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:53,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:53,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:56:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:53,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:56:53,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:53,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841210639] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:53,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-06 22:56:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555951721] [2023-11-06 22:56:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:56:54,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 315 [2023-11-06 22:56:54,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 114 transitions, 966 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 22:56:54,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:54,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 315 [2023-11-06 22:56:54,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:54,242 INFO L124 PetriNetUnfolderBase]: 714/1059 cut-off events. [2023-11-06 22:56:54,242 INFO L125 PetriNetUnfolderBase]: For 3649/3781 co-relation queries the response was YES. [2023-11-06 22:56:54,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4803 conditions, 1059 events. 714/1059 cut-off events. For 3649/3781 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4302 event pairs, 177 based on Foata normal form. 136/1132 useless extension candidates. Maximal degree in co-relation 4768. Up to 816 conditions per place. [2023-11-06 22:56:54,256 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 106 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2023-11-06 22:56:54,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 132 transitions, 1325 flow [2023-11-06 22:56:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:56:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:56:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2023-11-06 22:56:54,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438095238095238 [2023-11-06 22:56:54,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2023-11-06 22:56:54,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2023-11-06 22:56:54,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:54,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2023-11-06 22:56:54,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 22:56:54,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:54,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 22:56:54,287 INFO L175 Difference]: Start difference. First operand has 73 places, 114 transitions, 966 flow. Second operand 5 states and 699 transitions. [2023-11-06 22:56:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 132 transitions, 1325 flow [2023-11-06 22:56:54,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 1214 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-06 22:56:54,307 INFO L231 Difference]: Finished difference. Result has 72 places, 115 transitions, 924 flow [2023-11-06 22:56:54,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=72, PETRI_TRANSITIONS=115} [2023-11-06 22:56:54,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-11-06 22:56:54,308 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 115 transitions, 924 flow [2023-11-06 22:56:54,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 22:56:54,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:54,309 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] [2023-11-06 22:56:54,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:56:54,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:54,526 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 22:56:54,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:54,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1511488217, now seen corresponding path program 1 times [2023-11-06 22:56:54,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191041145] [2023-11-06 22:56:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:54,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:55,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191041145] [2023-11-06 22:56:55,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191041145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:55,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303930531] [2023-11-06 22:56:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:55,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:55,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:55,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:55,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:56:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:55,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:56:55,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:55,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2023-11-06 22:56:56,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:56:56,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:56:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:56,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:56,658 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:56:56,659 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 64 treesize of output 48 [2023-11-06 22:56:56,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-06 22:56:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303930531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:57,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:57,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:56:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552742020] [2023-11-06 22:56:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:56:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:56:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=495, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:56:58,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 315 [2023-11-06 22:56:58,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 115 transitions, 924 flow. Second operand has 25 states, 25 states have (on average 90.6) internal successors, (2265), 25 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states 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 22:56:58,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:58,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 315 [2023-11-06 22:56:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:00,217 INFO L124 PetriNetUnfolderBase]: 1351/1986 cut-off events. [2023-11-06 22:57:00,218 INFO L125 PetriNetUnfolderBase]: For 6290/6457 co-relation queries the response was YES. [2023-11-06 22:57:00,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9290 conditions, 1986 events. 1351/1986 cut-off events. For 6290/6457 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8677 event pairs, 154 based on Foata normal form. 133/2111 useless extension candidates. Maximal degree in co-relation 8107. Up to 1257 conditions per place. [2023-11-06 22:57:00,253 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 207 selfloop transitions, 131 changer transitions 5/349 dead transitions. [2023-11-06 22:57:00,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 349 transitions, 3406 flow [2023-11-06 22:57:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:57:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:57:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1179 transitions. [2023-11-06 22:57:00,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119047619047619 [2023-11-06 22:57:00,260 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1179 transitions. [2023-11-06 22:57:00,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1179 transitions. [2023-11-06 22:57:00,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:00,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1179 transitions. [2023-11-06 22:57:00,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.25) internal successors, (1179), 12 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states 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 22:57:00,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 315.0) internal successors, (4095), 13 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 22:57:00,274 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 315.0) internal successors, (4095), 13 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 22:57:00,274 INFO L175 Difference]: Start difference. First operand has 72 places, 115 transitions, 924 flow. Second operand 12 states and 1179 transitions. [2023-11-06 22:57:00,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 349 transitions, 3406 flow [2023-11-06 22:57:00,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 349 transitions, 3369 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:57:00,317 INFO L231 Difference]: Finished difference. Result has 87 places, 219 transitions, 2254 flow [2023-11-06 22:57:00,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2254, PETRI_PLACES=87, PETRI_TRANSITIONS=219} [2023-11-06 22:57:00,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-11-06 22:57:00,319 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 219 transitions, 2254 flow [2023-11-06 22:57:00,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.6) internal successors, (2265), 25 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states 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 22:57:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:00,320 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] [2023-11-06 22:57:00,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:00,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:00,526 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 22:57:00,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -549478487, now seen corresponding path program 1 times [2023-11-06 22:57:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840535048] [2023-11-06 22:57:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840535048] [2023-11-06 22:57:01,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840535048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214893951] [2023-11-06 22:57:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:01,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:01,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:57:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:01,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:57:01,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:01,329 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 22:57:01,397 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 22:57:01,451 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 22:57:01,501 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 22:57:01,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:01,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214893951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:01,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:01,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 14 [2023-11-06 22:57:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490275264] [2023-11-06 22:57:01,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:57:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:57:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:57:02,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 315 [2023-11-06 22:57:02,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 219 transitions, 2254 flow. Second operand has 16 states, 16 states have (on average 119.1875) internal successors, (1907), 16 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states 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 22:57:02,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:02,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 315 [2023-11-06 22:57:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:03,883 INFO L124 PetriNetUnfolderBase]: 2071/3022 cut-off events. [2023-11-06 22:57:03,883 INFO L125 PetriNetUnfolderBase]: For 14295/14526 co-relation queries the response was YES. [2023-11-06 22:57:03,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16445 conditions, 3022 events. 2071/3022 cut-off events. For 14295/14526 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14063 event pairs, 180 based on Foata normal form. 206/3175 useless extension candidates. Maximal degree in co-relation 16092. Up to 1960 conditions per place. [2023-11-06 22:57:03,918 INFO L140 encePairwiseOnDemand]: 303/315 looper letters, 211 selfloop transitions, 196 changer transitions 1/420 dead transitions. [2023-11-06 22:57:03,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 420 transitions, 4954 flow [2023-11-06 22:57:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:57:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:57:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1132 transitions. [2023-11-06 22:57:03,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39929453262786596 [2023-11-06 22:57:03,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1132 transitions. [2023-11-06 22:57:03,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1132 transitions. [2023-11-06 22:57:03,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:03,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1132 transitions. [2023-11-06 22:57:03,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.77777777777777) internal successors, (1132), 9 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states 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 22:57:03,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 315.0) internal successors, (3150), 10 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 22:57:03,936 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 315.0) internal successors, (3150), 10 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 22:57:03,936 INFO L175 Difference]: Start difference. First operand has 87 places, 219 transitions, 2254 flow. Second operand 9 states and 1132 transitions. [2023-11-06 22:57:03,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 420 transitions, 4954 flow [2023-11-06 22:57:04,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 420 transitions, 4695 flow, removed 103 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:04,046 INFO L231 Difference]: Finished difference. Result has 97 places, 328 transitions, 3879 flow [2023-11-06 22:57:04,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3879, PETRI_PLACES=97, PETRI_TRANSITIONS=328} [2023-11-06 22:57:04,047 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-11-06 22:57:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 328 transitions, 3879 flow [2023-11-06 22:57:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.1875) internal successors, (1907), 16 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states 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 22:57:04,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:04,048 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] [2023-11-06 22:57:04,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:57:04,255 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 22:57:04,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1968304041, now seen corresponding path program 2 times [2023-11-06 22:57:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:04,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308435271] [2023-11-06 22:57:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308435271] [2023-11-06 22:57:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308435271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700195988] [2023-11-06 22:57:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:57:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:05,018 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:05,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:57:05,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:57:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:05,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:57:05,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:05,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:05,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:05,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:05,627 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 28 treesize of output 21 [2023-11-06 22:57:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:06,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700195988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:06,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:06,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-06 22:57:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032794642] [2023-11-06 22:57:06,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:57:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:57:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:57:07,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 315 [2023-11-06 22:57:07,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 328 transitions, 3879 flow. Second operand has 23 states, 23 states have (on average 114.65217391304348) internal successors, (2637), 23 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states 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 22:57:07,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:07,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 315 [2023-11-06 22:57:07,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:09,440 INFO L124 PetriNetUnfolderBase]: 2429/3546 cut-off events. [2023-11-06 22:57:09,440 INFO L125 PetriNetUnfolderBase]: For 18351/18351 co-relation queries the response was YES. [2023-11-06 22:57:09,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20848 conditions, 3546 events. 2429/3546 cut-off events. For 18351/18351 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16183 event pairs, 371 based on Foata normal form. 1/3547 useless extension candidates. Maximal degree in co-relation 20507. Up to 3004 conditions per place. [2023-11-06 22:57:09,471 INFO L140 encePairwiseOnDemand]: 303/315 looper letters, 360 selfloop transitions, 167 changer transitions 1/528 dead transitions. [2023-11-06 22:57:09,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 528 transitions, 6748 flow [2023-11-06 22:57:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:57:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:57:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2742 transitions. [2023-11-06 22:57:09,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784679089026915 [2023-11-06 22:57:09,483 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2742 transitions. [2023-11-06 22:57:09,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2742 transitions. [2023-11-06 22:57:09,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:09,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2742 transitions. [2023-11-06 22:57:09,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 119.21739130434783) internal successors, (2742), 23 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states 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 22:57:09,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 315.0) internal successors, (7560), 24 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:57:09,504 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 315.0) internal successors, (7560), 24 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:57:09,505 INFO L175 Difference]: Start difference. First operand has 97 places, 328 transitions, 3879 flow. Second operand 23 states and 2742 transitions. [2023-11-06 22:57:09,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 528 transitions, 6748 flow [2023-11-06 22:57:09,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 528 transitions, 6627 flow, removed 58 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:09,663 INFO L231 Difference]: Finished difference. Result has 131 places, 430 transitions, 5605 flow [2023-11-06 22:57:09,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5605, PETRI_PLACES=131, PETRI_TRANSITIONS=430} [2023-11-06 22:57:09,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2023-11-06 22:57:09,665 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 430 transitions, 5605 flow [2023-11-06 22:57:09,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 114.65217391304348) internal successors, (2637), 23 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states 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 22:57:09,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:09,667 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] [2023-11-06 22:57:09,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:09,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:09,873 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 22:57:09,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:09,874 INFO L85 PathProgramCache]: Analyzing trace with hash 973303367, now seen corresponding path program 2 times [2023-11-06 22:57:09,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:09,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553114456] [2023-11-06 22:57:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:10,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:10,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553114456] [2023-11-06 22:57:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553114456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:10,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756443276] [2023-11-06 22:57:10,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:57:10,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:10,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:10,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:57:10,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:57:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:10,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:57:10,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:10,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-06 22:57:10,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:57:10,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:11,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:11,240 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:11,241 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 56 treesize of output 44 [2023-11-06 22:57:11,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-06 22:57:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:11,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756443276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:11,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:11,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:57:11,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078500298] [2023-11-06 22:57:11,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:11,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:57:11,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:11,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:57:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=186, Unknown=2, NotChecked=0, Total=240 [2023-11-06 22:57:12,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 315 [2023-11-06 22:57:12,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 430 transitions, 5605 flow. Second operand has 16 states, 16 states have (on average 108.75) internal successors, (1740), 16 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 22:57:12,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:12,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 315 [2023-11-06 22:57:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:13,622 INFO L124 PetriNetUnfolderBase]: 2744/3999 cut-off events. [2023-11-06 22:57:13,622 INFO L125 PetriNetUnfolderBase]: For 31121/31385 co-relation queries the response was YES. [2023-11-06 22:57:13,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26312 conditions, 3999 events. 2744/3999 cut-off events. For 31121/31385 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 19481 event pairs, 218 based on Foata normal form. 235/4155 useless extension candidates. Maximal degree in co-relation 25929. Up to 2188 conditions per place. [2023-11-06 22:57:13,676 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 218 selfloop transitions, 331 changer transitions 1/566 dead transitions. [2023-11-06 22:57:13,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 566 transitions, 8137 flow [2023-11-06 22:57:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 935 transitions. [2023-11-06 22:57:13,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2023-11-06 22:57:13,686 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 935 transitions. [2023-11-06 22:57:13,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 935 transitions. [2023-11-06 22:57:13,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:13,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 935 transitions. [2023-11-06 22:57:13,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states 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 22:57:13,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:13,712 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:13,713 INFO L175 Difference]: Start difference. First operand has 131 places, 430 transitions, 5605 flow. Second operand 8 states and 935 transitions. [2023-11-06 22:57:13,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 566 transitions, 8137 flow [2023-11-06 22:57:14,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 566 transitions, 7925 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-11-06 22:57:14,053 INFO L231 Difference]: Finished difference. Result has 135 places, 490 transitions, 7221 flow [2023-11-06 22:57:14,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7221, PETRI_PLACES=135, PETRI_TRANSITIONS=490} [2023-11-06 22:57:14,055 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-11-06 22:57:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 490 transitions, 7221 flow [2023-11-06 22:57:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.75) internal successors, (1740), 16 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 22:57:14,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:14,057 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] [2023-11-06 22:57:14,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:14,263 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 22:57:14,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash 622578837, now seen corresponding path program 3 times [2023-11-06 22:57:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819538760] [2023-11-06 22:57:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:14,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819538760] [2023-11-06 22:57:14,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819538760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112824396] [2023-11-06 22:57:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:57:14,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:14,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:57:14,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:57:14,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:14,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:57:14,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:15,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:15,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:15,307 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:15,308 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 28 treesize of output 21 [2023-11-06 22:57:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112824396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:15,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:15,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-11-06 22:57:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515528072] [2023-11-06 22:57:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:57:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:57:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:57:16,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 315 [2023-11-06 22:57:16,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 490 transitions, 7221 flow. Second operand has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 22:57:16,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:16,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 315 [2023-11-06 22:57:16,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:17,731 INFO L124 PetriNetUnfolderBase]: 3175/4581 cut-off events. [2023-11-06 22:57:17,731 INFO L125 PetriNetUnfolderBase]: For 45335/45695 co-relation queries the response was YES. [2023-11-06 22:57:17,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33666 conditions, 4581 events. 3175/4581 cut-off events. For 45335/45695 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22460 event pairs, 417 based on Foata normal form. 321/4799 useless extension candidates. Maximal degree in co-relation 33264. Up to 3850 conditions per place. [2023-11-06 22:57:17,779 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 416 selfloop transitions, 189 changer transitions 1/622 dead transitions. [2023-11-06 22:57:17,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 622 transitions, 10063 flow [2023-11-06 22:57:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1095 transitions. [2023-11-06 22:57:17,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2023-11-06 22:57:17,783 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1095 transitions. [2023-11-06 22:57:17,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1095 transitions. [2023-11-06 22:57:17,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:17,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1095 transitions. [2023-11-06 22:57:17,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 22:57:17,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:17,792 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:17,792 INFO L175 Difference]: Start difference. First operand has 135 places, 490 transitions, 7221 flow. Second operand 8 states and 1095 transitions. [2023-11-06 22:57:17,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 622 transitions, 10063 flow [2023-11-06 22:57:18,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 622 transitions, 9793 flow, removed 63 selfloop flow, removed 3 redundant places. [2023-11-06 22:57:18,227 INFO L231 Difference]: Finished difference. Result has 142 places, 567 transitions, 8744 flow [2023-11-06 22:57:18,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8744, PETRI_PLACES=142, PETRI_TRANSITIONS=567} [2023-11-06 22:57:18,229 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-11-06 22:57:18,229 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 567 transitions, 8744 flow [2023-11-06 22:57:18,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 22:57:18,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:18,230 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] [2023-11-06 22:57:18,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:18,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:18,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 22:57:18,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -259409801, now seen corresponding path program 3 times [2023-11-06 22:57:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:18,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749176351] [2023-11-06 22:57:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749176351] [2023-11-06 22:57:19,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749176351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:19,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433360586] [2023-11-06 22:57:19,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:57:19,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:19,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:19,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:57:19,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:57:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:19,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:57:19,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:19,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:19,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:19,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:19,967 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 28 treesize of output 21 [2023-11-06 22:57:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433360586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:20,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:20,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-06 22:57:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575299273] [2023-11-06 22:57:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:57:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:57:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:57:22,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 315 [2023-11-06 22:57:22,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 567 transitions, 8744 flow. Second operand has 23 states, 23 states have (on average 112.95652173913044) internal successors, (2598), 23 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states 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 22:57:22,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:22,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 315 [2023-11-06 22:57:22,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:23,726 INFO L124 PetriNetUnfolderBase]: 3411/4945 cut-off events. [2023-11-06 22:57:23,726 INFO L125 PetriNetUnfolderBase]: For 45306/45306 co-relation queries the response was YES. [2023-11-06 22:57:23,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36113 conditions, 4945 events. 3411/4945 cut-off events. For 45306/45306 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23790 event pairs, 566 based on Foata normal form. 1/4946 useless extension candidates. Maximal degree in co-relation 35701. Up to 4445 conditions per place. [2023-11-06 22:57:23,772 INFO L140 encePairwiseOnDemand]: 303/315 looper letters, 504 selfloop transitions, 164 changer transitions 1/669 dead transitions. [2023-11-06 22:57:23,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 669 transitions, 11054 flow [2023-11-06 22:57:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:57:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:57:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2349 transitions. [2023-11-06 22:57:23,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37285714285714283 [2023-11-06 22:57:23,779 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2349 transitions. [2023-11-06 22:57:23,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2349 transitions. [2023-11-06 22:57:23,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:23,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2349 transitions. [2023-11-06 22:57:23,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 117.45) internal successors, (2349), 20 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states 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 22:57:23,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states 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 22:57:23,796 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states 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 22:57:23,797 INFO L175 Difference]: Start difference. First operand has 142 places, 567 transitions, 8744 flow. Second operand 20 states and 2349 transitions. [2023-11-06 22:57:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 669 transitions, 11054 flow [2023-11-06 22:57:24,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 669 transitions, 10692 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:24,365 INFO L231 Difference]: Finished difference. Result has 160 places, 589 transitions, 9068 flow [2023-11-06 22:57:24,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9068, PETRI_PLACES=160, PETRI_TRANSITIONS=589} [2023-11-06 22:57:24,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-11-06 22:57:24,367 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 589 transitions, 9068 flow [2023-11-06 22:57:24,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 112.95652173913044) internal successors, (2598), 23 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states 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 22:57:24,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:24,368 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] [2023-11-06 22:57:24,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:57:24,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 22:57:24,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -912909719, now seen corresponding path program 4 times [2023-11-06 22:57:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609359742] [2023-11-06 22:57:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609359742] [2023-11-06 22:57:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609359742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447406958] [2023-11-06 22:57:25,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:57:25,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:25,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:25,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:57:25,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:57:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:25,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:57:25,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:25,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:25,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:25,570 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:25,570 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 28 treesize of output 21 [2023-11-06 22:57:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447406958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:26,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-11-06 22:57:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68132059] [2023-11-06 22:57:26,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:57:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:57:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:57:26,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 315 [2023-11-06 22:57:26,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 589 transitions, 9068 flow. Second operand has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 22:57:26,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:26,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 315 [2023-11-06 22:57:26,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:28,064 INFO L124 PetriNetUnfolderBase]: 3434/4968 cut-off events. [2023-11-06 22:57:28,065 INFO L125 PetriNetUnfolderBase]: For 51626/52024 co-relation queries the response was YES. [2023-11-06 22:57:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37042 conditions, 4968 events. 3434/4968 cut-off events. For 51626/52024 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24930 event pairs, 480 based on Foata normal form. 351/5208 useless extension candidates. Maximal degree in co-relation 36624. Up to 4417 conditions per place. [2023-11-06 22:57:28,125 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 465 selfloop transitions, 151 changer transitions 1/636 dead transitions. [2023-11-06 22:57:28,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 636 transitions, 10702 flow [2023-11-06 22:57:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1092 transitions. [2023-11-06 22:57:28,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-06 22:57:28,129 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1092 transitions. [2023-11-06 22:57:28,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1092 transitions. [2023-11-06 22:57:28,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:28,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1092 transitions. [2023-11-06 22:57:28,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.5) internal successors, (1092), 8 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 22:57:28,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:28,137 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:28,137 INFO L175 Difference]: Start difference. First operand has 160 places, 589 transitions, 9068 flow. Second operand 8 states and 1092 transitions. [2023-11-06 22:57:28,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 636 transitions, 10702 flow [2023-11-06 22:57:28,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 636 transitions, 10387 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-11-06 22:57:28,583 INFO L231 Difference]: Finished difference. Result has 161 places, 597 transitions, 9203 flow [2023-11-06 22:57:28,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9203, PETRI_PLACES=161, PETRI_TRANSITIONS=597} [2023-11-06 22:57:28,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2023-11-06 22:57:28,584 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 597 transitions, 9203 flow [2023-11-06 22:57:28,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 22:57:28,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:28,585 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] [2023-11-06 22:57:28,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:28,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:57:28,792 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 22:57:28,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash -983941449, now seen corresponding path program 5 times [2023-11-06 22:57:28,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:28,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125251138] [2023-11-06 22:57:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:28,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125251138] [2023-11-06 22:57:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125251138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275318083] [2023-11-06 22:57:29,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:57:29,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:29,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:29,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:57:29,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:57:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:29,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:57:29,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:29,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 174 [2023-11-06 22:57:29,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:57:29,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:29,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:30,008 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_552) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2023-11-06 22:57:30,022 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:30,022 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 64 treesize of output 48 [2023-11-06 22:57:30,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-06 22:57:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275318083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:30,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:57:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526681385] [2023-11-06 22:57:30,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:57:30,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:57:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=156, Unknown=1, NotChecked=26, Total=240 [2023-11-06 22:57:30,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 315 [2023-11-06 22:57:30,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 597 transitions, 9203 flow. Second operand has 16 states, 16 states have (on average 108.75) internal successors, (1740), 16 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 22:57:30,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:30,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 315 [2023-11-06 22:57:30,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:32,108 INFO L124 PetriNetUnfolderBase]: 3521/5104 cut-off events. [2023-11-06 22:57:32,108 INFO L125 PetriNetUnfolderBase]: For 53950/54372 co-relation queries the response was YES. [2023-11-06 22:57:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38244 conditions, 5104 events. 3521/5104 cut-off events. For 53950/54372 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25874 event pairs, 488 based on Foata normal form. 373/5368 useless extension candidates. Maximal degree in co-relation 37821. Up to 4449 conditions per place. [2023-11-06 22:57:32,158 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 466 selfloop transitions, 157 changer transitions 1/643 dead transitions. [2023-11-06 22:57:32,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 643 transitions, 10867 flow [2023-11-06 22:57:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2023-11-06 22:57:32,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-11-06 22:57:32,161 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2023-11-06 22:57:32,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2023-11-06 22:57:32,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:32,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2023-11-06 22:57:32,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 22:57:32,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:32,168 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:32,169 INFO L175 Difference]: Start difference. First operand has 161 places, 597 transitions, 9203 flow. Second operand 8 states and 924 transitions. [2023-11-06 22:57:32,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 643 transitions, 10867 flow [2023-11-06 22:57:32,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 643 transitions, 10612 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:32,620 INFO L231 Difference]: Finished difference. Result has 166 places, 604 transitions, 9423 flow [2023-11-06 22:57:32,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=8948, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9423, PETRI_PLACES=166, PETRI_TRANSITIONS=604} [2023-11-06 22:57:32,621 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-11-06 22:57:32,621 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 604 transitions, 9423 flow [2023-11-06 22:57:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.75) internal successors, (1740), 16 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 22:57:32,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:32,622 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] [2023-11-06 22:57:32,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:32,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 22:57:32,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash -500261017, now seen corresponding path program 6 times [2023-11-06 22:57:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127955810] [2023-11-06 22:57:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:33,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127955810] [2023-11-06 22:57:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127955810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599582459] [2023-11-06 22:57:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:57:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:33,364 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:33,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:57:33,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:57:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:33,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:57:33,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:33,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-06 22:57:33,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:57:33,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:57:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:33,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:33,802 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_588 (Array Int Int))) (= (mod (+ c_~sum3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_588) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4))) c_~sum2~0) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-11-06 22:57:33,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:33,817 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 64 treesize of output 48 [2023-11-06 22:57:33,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-06 22:57:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599582459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:34,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:34,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:57:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432526623] [2023-11-06 22:57:34,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:57:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:57:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=178, Unknown=1, NotChecked=28, Total=272 [2023-11-06 22:57:34,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 315 [2023-11-06 22:57:34,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 604 transitions, 9423 flow. Second operand has 17 states, 17 states have (on average 109.17647058823529) internal successors, (1856), 17 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 22:57:34,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:34,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 315 [2023-11-06 22:57:34,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:36,131 INFO L124 PetriNetUnfolderBase]: 3724/5390 cut-off events. [2023-11-06 22:57:36,131 INFO L125 PetriNetUnfolderBase]: For 59167/59624 co-relation queries the response was YES. [2023-11-06 22:57:36,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40961 conditions, 5390 events. 3724/5390 cut-off events. For 59167/59624 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27488 event pairs, 542 based on Foata normal form. 400/5668 useless extension candidates. Maximal degree in co-relation 40532. Up to 4440 conditions per place. [2023-11-06 22:57:36,193 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 439 selfloop transitions, 226 changer transitions 1/685 dead transitions. [2023-11-06 22:57:36,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 685 transitions, 11620 flow [2023-11-06 22:57:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:57:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:57:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 927 transitions. [2023-11-06 22:57:36,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678571428571429 [2023-11-06 22:57:36,197 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 927 transitions. [2023-11-06 22:57:36,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 927 transitions. [2023-11-06 22:57:36,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:36,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 927 transitions. [2023-11-06 22:57:36,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states 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 22:57:36,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:36,204 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 22:57:36,204 INFO L175 Difference]: Start difference. First operand has 166 places, 604 transitions, 9423 flow. Second operand 8 states and 927 transitions. [2023-11-06 22:57:36,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 685 transitions, 11620 flow [2023-11-06 22:57:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 685 transitions, 11351 flow, removed 43 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:36,739 INFO L231 Difference]: Finished difference. Result has 171 places, 631 transitions, 10203 flow [2023-11-06 22:57:36,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=9162, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10203, PETRI_PLACES=171, PETRI_TRANSITIONS=631} [2023-11-06 22:57:36,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2023-11-06 22:57:36,740 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 631 transitions, 10203 flow [2023-11-06 22:57:36,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.17647058823529) internal successors, (1856), 17 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 22:57:36,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:36,740 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] [2023-11-06 22:57:36,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:36,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 22:57:36,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1345374821, now seen corresponding path program 4 times [2023-11-06 22:57:36,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:36,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981049347] [2023-11-06 22:57:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:37,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981049347] [2023-11-06 22:57:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981049347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62651668] [2023-11-06 22:57:37,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:57:37,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:37,940 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:37,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:57:38,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:57:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:38,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:57:38,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:38,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:38,378 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 17 treesize of output 15 [2023-11-06 22:57:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:38,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:38,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:38,654 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 28 treesize of output 21 [2023-11-06 22:57:38,984 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-06 22:57:38,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:39,185 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: critical constraint is false at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:441) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 22:57:39,189 INFO L158 Benchmark]: Toolchain (without parser) took 65731.26ms. Allocated memory was 163.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 126.3MB in the beginning and 893.1MB in the end (delta: -766.8MB). Peak memory consumption was 347.8MB. Max. memory is 16.1GB. [2023-11-06 22:57:39,189 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 107.0MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:57:39,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.84ms. Allocated memory is still 163.6MB. Free memory was 125.8MB in the beginning and 114.3MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 22:57:39,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.71ms. Allocated memory is still 163.6MB. Free memory was 114.3MB in the beginning and 112.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:57:39,190 INFO L158 Benchmark]: Boogie Preprocessor took 66.21ms. Allocated memory is still 163.6MB. Free memory was 112.2MB in the beginning and 110.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:57:39,190 INFO L158 Benchmark]: RCFGBuilder took 564.20ms. Allocated memory is still 163.6MB. Free memory was 110.7MB in the beginning and 94.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 22:57:39,191 INFO L158 Benchmark]: TraceAbstraction took 64660.73ms. Allocated memory was 163.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 93.9MB in the beginning and 893.1MB in the end (delta: -799.2MB). Peak memory consumption was 316.4MB. Max. memory is 16.1GB. [2023-11-06 22:57:39,192 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 107.0MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.84ms. Allocated memory is still 163.6MB. Free memory was 125.8MB in the beginning and 114.3MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.71ms. Allocated memory is still 163.6MB. Free memory was 114.3MB in the beginning and 112.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 66.21ms. Allocated memory is still 163.6MB. Free memory was 112.2MB in the beginning and 110.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 564.20ms. Allocated memory is still 163.6MB. Free memory was 110.7MB in the beginning and 94.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 64660.73ms. Allocated memory was 163.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 93.9MB in the beginning and 893.1MB in the end (delta: -799.2MB). Peak memory consumption was 316.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.5s, 147 PlacesBefore, 30 PlacesAfterwards, 149 TransitionsBefore, 24 TransitionsAfterwards, 1950 CoEnabledTransitionPairs, 7 FixpointIterations, 84 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 152 TotalNumberOfCompositions, 2019 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1925, independent: 1905, independent conditional: 0, independent unconditional: 1905, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1040, independent: 1030, independent conditional: 0, independent unconditional: 1030, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1925, independent: 875, independent conditional: 0, independent unconditional: 875, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 1040, unknown conditional: 0, unknown unconditional: 1040] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: AssertionError: critical constraint is false de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: critical constraint is false: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:354) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-11-06 22:57:39,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:57:42,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:57:42,171 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-06 22:57:42,178 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:57:42,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:57:42,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:57:42,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:57:42,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:57:42,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:57:42,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:57:42,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:57:42,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:57:42,214 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:57:42,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:57:42,216 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:57:42,217 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:57:42,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:57:42,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:57:42,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:57:42,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:57:42,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:57:42,221 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:57:42,222 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:57:42,222 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:57:42,223 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:57:42,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:57:42,224 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:57:42,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:57:42,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:57:42,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:57:42,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:42,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:57:42,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:57:42,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:57:42,228 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:57:42,228 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:57:42,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:57:42,229 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:57:42,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:57:42,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:57:42,230 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:57:42,230 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:57:42,230 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2023-11-06 22:57:42,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:57:42,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:57:42,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:57:42,795 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:57:42,795 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:57:42,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-06 22:57:46,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:57:46,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:57:46,600 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-06 22:57:46,608 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/7d1aa326b/bbfdf24aabb943bda1cfe55bf856ffaf/FLAG0f20b1263 [2023-11-06 22:57:46,623 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/data/7d1aa326b/bbfdf24aabb943bda1cfe55bf856ffaf [2023-11-06 22:57:46,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:57:46,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:57:46,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:46,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:57:46,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:57:46,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:46" (1/1) ... [2023-11-06 22:57:46,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2e278a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:46, skipping insertion in model container [2023-11-06 22:57:46,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:46" (1/1) ... [2023-11-06 22:57:46,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:57:46,889 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-11-06 22:57:46,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:46,926 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:57:46,938 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:57:46,969 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-11-06 22:57:46,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:46,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:57:47,023 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_3b83fb8c-3f53-42a8-8be3-05d3961f6826/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2023-11-06 22:57:47,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:47,050 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:57:47,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47 WrapperNode [2023-11-06 22:57:47,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:47,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:47,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:57:47,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:57:47,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,118 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2023-11-06 22:57:47,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:47,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:57:47,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:57:47,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:57:47,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:57:47,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:57:47,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:57:47,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:57:47,188 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (1/1) ... [2023-11-06 22:57:47,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:47,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:57:47,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:57:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:57:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:57:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:57:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:57:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:57:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:57:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:57:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:57:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:57:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:57:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:57:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:57:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:57:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:57:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:57:47,267 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 22:57:47,434 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:57:47,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:57:47,825 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:57:47,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:57:47,842 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:57:47,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:47 BoogieIcfgContainer [2023-11-06 22:57:47,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:57:47,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:57:47,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:57:47,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:57:47,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:46" (1/3) ... [2023-11-06 22:57:47,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c5cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:47, skipping insertion in model container [2023-11-06 22:57:47,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:47" (2/3) ... [2023-11-06 22:57:47,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c5cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:47, skipping insertion in model container [2023-11-06 22:57:47,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:47" (3/3) ... [2023-11-06 22:57:47,857 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-11-06 22:57:47,866 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:57:47,877 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:57:47,877 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:57:47,878 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:57:48,018 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:57:48,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 160 transitions, 341 flow [2023-11-06 22:57:48,152 INFO L124 PetriNetUnfolderBase]: 12/157 cut-off events. [2023-11-06 22:57:48,153 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:57:48,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 12/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 22:57:48,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 160 transitions, 341 flow [2023-11-06 22:57:48,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 146 transitions, 310 flow [2023-11-06 22:57:48,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:57:48,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 146 transitions, 310 flow [2023-11-06 22:57:48,187 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 146 transitions, 310 flow [2023-11-06 22:57:48,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 146 transitions, 310 flow [2023-11-06 22:57:48,234 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-11-06 22:57:48,234 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:57:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 146 events. 12/146 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 111 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 22:57:48,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 1950 [2023-11-06 22:58:01,873 INFO L134 LiptonReduction]: Checked pairs total: 2022 [2023-11-06 22:58:01,873 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-06 22:58:01,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:58:01,919 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;@60df3f59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:58:01,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:58:01,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:58:01,929 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 22:58:01,930 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:58:01,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:01,930 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] [2023-11-06 22:58:01,931 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 22:58:01,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -476932756, now seen corresponding path program 1 times [2023-11-06 22:58:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091605758] [2023-11-06 22:58:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:01,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:58:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:02,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:58:02,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:02,438 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 22:58:02,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:02,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:02,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091605758] [2023-11-06 22:58:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091605758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:02,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:02,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:58:02,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723783990] [2023-11-06 22:58:02,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:02,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:02,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:02,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 304 [2023-11-06 22:58:02,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 22:58:02,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:02,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 304 [2023-11-06 22:58:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:02,775 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-11-06 22:58:02,776 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-06 22:58:02,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1611 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-06 22:58:02,783 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-11-06 22:58:02,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-11-06 22:58:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:58:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-06 22:58:02,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-11-06 22:58:02,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-06 22:58:02,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-06 22:58:02,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:02,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-06 22:58:02,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 22:58:02,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 22:58:02,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 22:58:02,825 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 464 transitions. [2023-11-06 22:58:02,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-11-06 22:58:02,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:58:02,833 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-06 22:58:02,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-06 22:58:02,839 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-06 22:58:02,839 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-06 22:58:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 22:58:02,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:02,840 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 22:58:02,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-06 22:58:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:03,053 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 22:58:03,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -105492628, now seen corresponding path program 1 times [2023-11-06 22:58:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:03,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347564462] [2023-11-06 22:58:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:03,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:03,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:58:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:03,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:58:03,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:03,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:03,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347564462] [2023-11-06 22:58:03,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347564462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:03,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:03,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:58:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414171385] [2023-11-06 22:58:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:03,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:58:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:58:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:58:03,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 304 [2023-11-06 22:58:03,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:03,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:03,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 304 [2023-11-06 22:58:03,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:04,000 INFO L124 PetriNetUnfolderBase]: 615/925 cut-off events. [2023-11-06 22:58:04,001 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-06 22:58:04,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 925 events. 615/925 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3806 event pairs, 223 based on Foata normal form. 34/957 useless extension candidates. Maximal degree in co-relation 490. Up to 484 conditions per place. [2023-11-06 22:58:04,012 INFO L140 encePairwiseOnDemand]: 298/304 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-06 22:58:04,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-11-06 22:58:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:58:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:58:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-11-06 22:58:04,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47171052631578947 [2023-11-06 22:58:04,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-11-06 22:58:04,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-11-06 22:58:04,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:04,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-11-06 22:58:04,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:04,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:04,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:04,031 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 717 transitions. [2023-11-06 22:58:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-11-06 22:58:04,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:58:04,035 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-11-06 22:58:04,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-06 22:58:04,036 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-06 22:58:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-11-06 22:58:04,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:04,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:04,038 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 22:58:04,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:04,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:04,252 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 22:58:04,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:04,253 INFO L85 PathProgramCache]: Analyzing trace with hash 412727018, now seen corresponding path program 1 times [2023-11-06 22:58:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756050070] [2023-11-06 22:58:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:04,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:04,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:04,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:58:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:04,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:04,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:04,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:04,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:04,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756050070] [2023-11-06 22:58:04,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756050070] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:04,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:04,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:04,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240931566] [2023-11-06 22:58:04,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:04,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:04,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:04,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:04,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:04,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:04,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:04,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:05,723 INFO L124 PetriNetUnfolderBase]: 1198/1768 cut-off events. [2023-11-06 22:58:05,723 INFO L125 PetriNetUnfolderBase]: For 832/832 co-relation queries the response was YES. [2023-11-06 22:58:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4542 conditions, 1768 events. 1198/1768 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7984 event pairs, 242 based on Foata normal form. 32/1793 useless extension candidates. Maximal degree in co-relation 2662. Up to 766 conditions per place. [2023-11-06 22:58:05,740 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 66 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2023-11-06 22:58:05,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 80 transitions, 429 flow [2023-11-06 22:58:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:58:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:58:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 853 transitions. [2023-11-06 22:58:05,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46765350877192985 [2023-11-06 22:58:05,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 853 transitions. [2023-11-06 22:58:05,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 853 transitions. [2023-11-06 22:58:05,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:05,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 853 transitions. [2023-11-06 22:58:05,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.16666666666666) internal successors, (853), 6 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 22:58:05,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:05,757 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:05,758 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 6 states and 853 transitions. [2023-11-06 22:58:05,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 80 transitions, 429 flow [2023-11-06 22:58:05,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 80 transitions, 425 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:58:05,767 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 201 flow [2023-11-06 22:58:05,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-06 22:58:05,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-11-06 22:58:05,769 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 201 flow [2023-11-06 22:58:05,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:05,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:05,770 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 22:58:05,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:05,985 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 22:58:05,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 677480922, now seen corresponding path program 2 times [2023-11-06 22:58:05,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248149085] [2023-11-06 22:58:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:05,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:05,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:05,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:58:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:06,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:06,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:06,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:06,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:06,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248149085] [2023-11-06 22:58:06,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248149085] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:06,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:06,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796020303] [2023-11-06 22:58:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:06,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:06,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:06,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:06,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:06,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:06,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:07,528 INFO L124 PetriNetUnfolderBase]: 1555/2291 cut-off events. [2023-11-06 22:58:07,532 INFO L125 PetriNetUnfolderBase]: For 2616/2616 co-relation queries the response was YES. [2023-11-06 22:58:07,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7236 conditions, 2291 events. 1555/2291 cut-off events. For 2616/2616 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10985 event pairs, 276 based on Foata normal form. 32/2323 useless extension candidates. Maximal degree in co-relation 4450. Up to 1050 conditions per place. [2023-11-06 22:58:07,553 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 67 selfloop transitions, 12 changer transitions 1/81 dead transitions. [2023-11-06 22:58:07,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 558 flow [2023-11-06 22:58:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:58:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:58:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2023-11-06 22:58:07,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46271929824561403 [2023-11-06 22:58:07,559 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2023-11-06 22:58:07,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2023-11-06 22:58:07,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:07,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2023-11-06 22:58:07,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states 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 22:58:07,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:07,578 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:07,579 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 201 flow. Second operand 6 states and 844 transitions. [2023-11-06 22:58:07,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 558 flow [2023-11-06 22:58:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 81 transitions, 552 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:58:07,592 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 275 flow [2023-11-06 22:58:07,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-06 22:58:07,594 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-11-06 22:58:07,594 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 275 flow [2023-11-06 22:58:07,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:07,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:07,595 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 22:58:07,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:07,808 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 22:58:07,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1699418712, now seen corresponding path program 1 times [2023-11-06 22:58:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003115142] [2023-11-06 22:58:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:07,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:07,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:07,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:58:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:07,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:07,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:08,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:08,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003115142] [2023-11-06 22:58:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003115142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:08,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:58:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169210637] [2023-11-06 22:58:08,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:08,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:58:08,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:58:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:58:08,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 304 [2023-11-06 22:58:08,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:08,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 304 [2023-11-06 22:58:08,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:09,296 INFO L124 PetriNetUnfolderBase]: 1543/2316 cut-off events. [2023-11-06 22:58:09,297 INFO L125 PetriNetUnfolderBase]: For 6443/6703 co-relation queries the response was YES. [2023-11-06 22:58:09,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 2316 events. 1543/2316 cut-off events. For 6443/6703 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11244 event pairs, 309 based on Foata normal form. 268/2562 useless extension candidates. Maximal degree in co-relation 5495. Up to 908 conditions per place. [2023-11-06 22:58:09,321 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 73 selfloop transitions, 16 changer transitions 2/93 dead transitions. [2023-11-06 22:58:09,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 93 transitions, 705 flow [2023-11-06 22:58:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 991 transitions. [2023-11-06 22:58:09,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656954887218045 [2023-11-06 22:58:09,327 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 991 transitions. [2023-11-06 22:58:09,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 991 transitions. [2023-11-06 22:58:09,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:09,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 991 transitions. [2023-11-06 22:58:09,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.57142857142858) internal successors, (991), 7 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 22:58:09,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:09,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:09,338 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 275 flow. Second operand 7 states and 991 transitions. [2023-11-06 22:58:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 93 transitions, 705 flow [2023-11-06 22:58:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 93 transitions, 656 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-06 22:58:09,355 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 324 flow [2023-11-06 22:58:09,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-06 22:58:09,359 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2023-11-06 22:58:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 324 flow [2023-11-06 22:58:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:09,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:09,362 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 22:58:09,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:09,565 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 22:58:09,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1683941802, now seen corresponding path program 2 times [2023-11-06 22:58:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:09,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215233124] [2023-11-06 22:58:09,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:09,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:09,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:09,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:58:09,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:09,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:09,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:09,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:10,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215233124] [2023-11-06 22:58:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215233124] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:10,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:10,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057478603] [2023-11-06 22:58:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:10,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:10,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:10,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:10,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:10,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:11,266 INFO L124 PetriNetUnfolderBase]: 2107/3146 cut-off events. [2023-11-06 22:58:11,266 INFO L125 PetriNetUnfolderBase]: For 11410/11752 co-relation queries the response was YES. [2023-11-06 22:58:11,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12485 conditions, 3146 events. 2107/3146 cut-off events. For 11410/11752 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15983 event pairs, 465 based on Foata normal form. 371/3486 useless extension candidates. Maximal degree in co-relation 8288. Up to 1198 conditions per place. [2023-11-06 22:58:11,302 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 90 selfloop transitions, 14 changer transitions 1/107 dead transitions. [2023-11-06 22:58:11,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 107 transitions, 1025 flow [2023-11-06 22:58:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:58:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:58:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 840 transitions. [2023-11-06 22:58:11,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-11-06 22:58:11,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 840 transitions. [2023-11-06 22:58:11,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 840 transitions. [2023-11-06 22:58:11,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:11,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 840 transitions. [2023-11-06 22:58:11,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 22:58:11,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:11,322 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:11,322 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 324 flow. Second operand 6 states and 840 transitions. [2023-11-06 22:58:11,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 107 transitions, 1025 flow [2023-11-06 22:58:11,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 107 transitions, 958 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-06 22:58:11,346 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 441 flow [2023-11-06 22:58:11,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-11-06 22:58:11,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2023-11-06 22:58:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 441 flow [2023-11-06 22:58:11,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:11,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:11,351 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 22:58:11,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:11,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:11,565 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 22:58:11,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1325904228, now seen corresponding path program 3 times [2023-11-06 22:58:11,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:11,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889134407] [2023-11-06 22:58:11,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:11,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:11,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:11,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:58:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:58:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:11,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:11,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:11,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:12,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889134407] [2023-11-06 22:58:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889134407] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381489008] [2023-11-06 22:58:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:12,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:12,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:12,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:12,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:12,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:13,402 INFO L124 PetriNetUnfolderBase]: 1897/2891 cut-off events. [2023-11-06 22:58:13,403 INFO L125 PetriNetUnfolderBase]: For 12185/12503 co-relation queries the response was YES. [2023-11-06 22:58:13,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12697 conditions, 2891 events. 1897/2891 cut-off events. For 12185/12503 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14783 event pairs, 408 based on Foata normal form. 358/3233 useless extension candidates. Maximal degree in co-relation 8550. Up to 1276 conditions per place. [2023-11-06 22:58:13,444 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 100 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2023-11-06 22:58:13,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 133 transitions, 1333 flow [2023-11-06 22:58:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 985 transitions. [2023-11-06 22:58:13,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46287593984962405 [2023-11-06 22:58:13,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 985 transitions. [2023-11-06 22:58:13,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 985 transitions. [2023-11-06 22:58:13,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:13,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 985 transitions. [2023-11-06 22:58:13,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.71428571428572) internal successors, (985), 7 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 22:58:13,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:13,461 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:13,461 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 441 flow. Second operand 7 states and 985 transitions. [2023-11-06 22:58:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 133 transitions, 1333 flow [2023-11-06 22:58:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 133 transitions, 1261 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-06 22:58:13,490 INFO L231 Difference]: Finished difference. Result has 67 places, 78 transitions, 842 flow [2023-11-06 22:58:13,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=842, PETRI_PLACES=67, PETRI_TRANSITIONS=78} [2023-11-06 22:58:13,491 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-11-06 22:58:13,491 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 78 transitions, 842 flow [2023-11-06 22:58:13,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:13,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:13,492 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 22:58:13,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:13,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:13,706 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 22:58:13,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 635806264, now seen corresponding path program 3 times [2023-11-06 22:58:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:13,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206120343] [2023-11-06 22:58:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:13,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:13,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:13,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:13,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:58:13,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:58:13,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:13,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:13,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:14,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:14,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206120343] [2023-11-06 22:58:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206120343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:58:14,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507169282] [2023-11-06 22:58:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:14,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:58:14,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:58:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:58:14,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 304 [2023-11-06 22:58:14,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 842 flow. Second operand has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:14,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:14,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 304 [2023-11-06 22:58:14,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:15,729 INFO L124 PetriNetUnfolderBase]: 2575/3838 cut-off events. [2023-11-06 22:58:15,729 INFO L125 PetriNetUnfolderBase]: For 20591/21001 co-relation queries the response was YES. [2023-11-06 22:58:15,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18055 conditions, 3838 events. 2575/3838 cut-off events. For 20591/21001 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 19652 event pairs, 836 based on Foata normal form. 505/4339 useless extension candidates. Maximal degree in co-relation 12216. Up to 2538 conditions per place. [2023-11-06 22:58:15,760 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 86 selfloop transitions, 58 changer transitions 0/146 dead transitions. [2023-11-06 22:58:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 146 transitions, 1733 flow [2023-11-06 22:58:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2023-11-06 22:58:15,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146616541353386 [2023-11-06 22:58:15,765 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2023-11-06 22:58:15,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2023-11-06 22:58:15,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:15,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2023-11-06 22:58:15,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 22:58:15,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:15,776 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:15,776 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 842 flow. Second operand 7 states and 982 transitions. [2023-11-06 22:58:15,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 146 transitions, 1733 flow [2023-11-06 22:58:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 146 transitions, 1703 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-06 22:58:15,820 INFO L231 Difference]: Finished difference. Result has 75 places, 98 transitions, 1269 flow [2023-11-06 22:58:15,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1269, PETRI_PLACES=75, PETRI_TRANSITIONS=98} [2023-11-06 22:58:15,823 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-11-06 22:58:15,823 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 98 transitions, 1269 flow [2023-11-06 22:58:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:15,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:15,824 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 22:58:15,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:16,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:16,037 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 22:58:16,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 776143820, now seen corresponding path program 4 times [2023-11-06 22:58:16,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:16,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504358109] [2023-11-06 22:58:16,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:58:16,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:16,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:16,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:16,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:58:16,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:58:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:16,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:16,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:16,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:16,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:16,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504358109] [2023-11-06 22:58:16,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504358109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:16,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:16,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:58:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722200643] [2023-11-06 22:58:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:58:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:58:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:58:16,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 304 [2023-11-06 22:58:16,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 1269 flow. Second operand has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:16,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:16,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 304 [2023-11-06 22:58:16,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:17,733 INFO L124 PetriNetUnfolderBase]: 2439/3692 cut-off events. [2023-11-06 22:58:17,734 INFO L125 PetriNetUnfolderBase]: For 25611/26057 co-relation queries the response was YES. [2023-11-06 22:58:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19407 conditions, 3692 events. 2439/3692 cut-off events. For 25611/26057 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 19554 event pairs, 521 based on Foata normal form. 528/4207 useless extension candidates. Maximal degree in co-relation 13343. Up to 1995 conditions per place. [2023-11-06 22:58:17,774 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 133 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2023-11-06 22:58:17,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 187 transitions, 2711 flow [2023-11-06 22:58:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 980 transitions. [2023-11-06 22:58:17,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-11-06 22:58:17,780 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 980 transitions. [2023-11-06 22:58:17,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 980 transitions. [2023-11-06 22:58:17,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:17,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 980 transitions. [2023-11-06 22:58:17,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 22:58:17,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:17,792 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:17,792 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 1269 flow. Second operand 7 states and 980 transitions. [2023-11-06 22:58:17,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 187 transitions, 2711 flow [2023-11-06 22:58:17,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 187 transitions, 2509 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-06 22:58:17,887 INFO L231 Difference]: Finished difference. Result has 80 places, 137 transitions, 2031 flow [2023-11-06 22:58:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2031, PETRI_PLACES=80, PETRI_TRANSITIONS=137} [2023-11-06 22:58:17,889 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-11-06 22:58:17,889 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 137 transitions, 2031 flow [2023-11-06 22:58:17,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:17,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:17,890 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 22:58:17,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:18,108 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 22:58:18,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1642993456, now seen corresponding path program 5 times [2023-11-06 22:58:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:18,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159978840] [2023-11-06 22:58:18,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:58:18,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:18,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:18,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:58:18,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:18,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:18,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:18,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:18,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159978840] [2023-11-06 22:58:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159978840] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:18,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705069340] [2023-11-06 22:58:18,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:18,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:18,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:18,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 137 transitions, 2031 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:18,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:18,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:18,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:20,046 INFO L124 PetriNetUnfolderBase]: 2355/3584 cut-off events. [2023-11-06 22:58:20,046 INFO L125 PetriNetUnfolderBase]: For 26968/27396 co-relation queries the response was YES. [2023-11-06 22:58:20,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20380 conditions, 3584 events. 2355/3584 cut-off events. For 26968/27396 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18915 event pairs, 478 based on Foata normal form. 362/3922 useless extension candidates. Maximal degree in co-relation 14452. Up to 1776 conditions per place. [2023-11-06 22:58:20,077 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 89 selfloop transitions, 105 changer transitions 0/196 dead transitions. [2023-11-06 22:58:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 196 transitions, 2972 flow [2023-11-06 22:58:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:58:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:58:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 845 transitions. [2023-11-06 22:58:20,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46326754385964913 [2023-11-06 22:58:20,082 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 845 transitions. [2023-11-06 22:58:20,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 845 transitions. [2023-11-06 22:58:20,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:20,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 845 transitions. [2023-11-06 22:58:20,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.83333333333334) internal successors, (845), 6 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 22:58:20,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:20,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states 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 22:58:20,092 INFO L175 Difference]: Start difference. First operand has 80 places, 137 transitions, 2031 flow. Second operand 6 states and 845 transitions. [2023-11-06 22:58:20,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 196 transitions, 2972 flow [2023-11-06 22:58:20,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 196 transitions, 2929 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-06 22:58:20,199 INFO L231 Difference]: Finished difference. Result has 84 places, 155 transitions, 2552 flow [2023-11-06 22:58:20,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2552, PETRI_PLACES=84, PETRI_TRANSITIONS=155} [2023-11-06 22:58:20,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-11-06 22:58:20,200 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 155 transitions, 2552 flow [2023-11-06 22:58:20,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:20,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:20,201 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 22:58:20,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:20,424 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 22:58:20,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1077565272, now seen corresponding path program 4 times [2023-11-06 22:58:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:20,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507920421] [2023-11-06 22:58:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:58:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:20,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:20,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:58:20,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:58:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:20,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:20,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:20,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:20,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:20,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507920421] [2023-11-06 22:58:20,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507920421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:20,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:20,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:58:20,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750769654] [2023-11-06 22:58:20,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:20,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:58:20,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:20,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:58:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:58:20,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 304 [2023-11-06 22:58:20,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 155 transitions, 2552 flow. Second operand has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:20,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:20,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 304 [2023-11-06 22:58:20,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:22,105 INFO L124 PetriNetUnfolderBase]: 2393/3678 cut-off events. [2023-11-06 22:58:22,106 INFO L125 PetriNetUnfolderBase]: For 33203/33651 co-relation queries the response was YES. [2023-11-06 22:58:22,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20954 conditions, 3678 events. 2393/3678 cut-off events. For 33203/33651 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19608 event pairs, 508 based on Foata normal form. 460/4104 useless extension candidates. Maximal degree in co-relation 14782. Up to 1306 conditions per place. [2023-11-06 22:58:22,138 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 79 selfloop transitions, 107 changer transitions 7/196 dead transitions. [2023-11-06 22:58:22,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 196 transitions, 3181 flow [2023-11-06 22:58:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 989 transitions. [2023-11-06 22:58:22,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46475563909774437 [2023-11-06 22:58:22,144 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 989 transitions. [2023-11-06 22:58:22,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 989 transitions. [2023-11-06 22:58:22,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:22,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 989 transitions. [2023-11-06 22:58:22,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states 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 22:58:22,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:22,153 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:22,153 INFO L175 Difference]: Start difference. First operand has 84 places, 155 transitions, 2552 flow. Second operand 7 states and 989 transitions. [2023-11-06 22:58:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 196 transitions, 3181 flow [2023-11-06 22:58:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 196 transitions, 3037 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-11-06 22:58:22,246 INFO L231 Difference]: Finished difference. Result has 90 places, 157 transitions, 2662 flow [2023-11-06 22:58:22,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2662, PETRI_PLACES=90, PETRI_TRANSITIONS=157} [2023-11-06 22:58:22,247 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-11-06 22:58:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 157 transitions, 2662 flow [2023-11-06 22:58:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:58:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:22,249 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 22:58:22,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:22,460 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 22:58:22,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:22,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1948008568, now seen corresponding path program 5 times [2023-11-06 22:58:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:22,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026901123] [2023-11-06 22:58:22,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:58:22,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:22,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:22,462 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:22,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:58:22,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:22,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:22,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:23,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:23,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:23,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026901123] [2023-11-06 22:58:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026901123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:23,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:23,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:58:23,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670035836] [2023-11-06 22:58:23,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:58:23,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:58:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:58:23,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 304 [2023-11-06 22:58:23,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 157 transitions, 2662 flow. Second operand has 9 states, 9 states have (on average 130.33333333333334) internal successors, (1173), 9 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 22:58:23,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:23,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 304 [2023-11-06 22:58:23,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:25,061 INFO L124 PetriNetUnfolderBase]: 2693/4133 cut-off events. [2023-11-06 22:58:25,061 INFO L125 PetriNetUnfolderBase]: For 38069/38069 co-relation queries the response was YES. [2023-11-06 22:58:25,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24008 conditions, 4133 events. 2693/4133 cut-off events. For 38069/38069 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21595 event pairs, 664 based on Foata normal form. 8/4141 useless extension candidates. Maximal degree in co-relation 18013. Up to 2298 conditions per place. [2023-11-06 22:58:25,112 INFO L140 encePairwiseOnDemand]: 293/304 looper letters, 215 selfloop transitions, 36 changer transitions 11/262 dead transitions. [2023-11-06 22:58:25,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 262 transitions, 4597 flow [2023-11-06 22:58:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:58:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:58:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1218 transitions. [2023-11-06 22:58:25,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451754385964912 [2023-11-06 22:58:25,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1218 transitions. [2023-11-06 22:58:25,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1218 transitions. [2023-11-06 22:58:25,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:25,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1218 transitions. [2023-11-06 22:58:25,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 135.33333333333334) internal successors, (1218), 9 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states 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 22:58:25,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states 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 22:58:25,133 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states 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 22:58:25,133 INFO L175 Difference]: Start difference. First operand has 90 places, 157 transitions, 2662 flow. Second operand 9 states and 1218 transitions. [2023-11-06 22:58:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 262 transitions, 4597 flow [2023-11-06 22:58:25,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 262 transitions, 4319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:58:25,283 INFO L231 Difference]: Finished difference. Result has 98 places, 177 transitions, 3001 flow [2023-11-06 22:58:25,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3001, PETRI_PLACES=98, PETRI_TRANSITIONS=177} [2023-11-06 22:58:25,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2023-11-06 22:58:25,285 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 177 transitions, 3001 flow [2023-11-06 22:58:25,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 130.33333333333334) internal successors, (1173), 9 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 22:58:25,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:25,286 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 22:58:25,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:25,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:25,498 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 22:58:25,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -319079972, now seen corresponding path program 6 times [2023-11-06 22:58:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:25,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256605296] [2023-11-06 22:58:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:58:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:25,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:25,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:58:25,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:58:25,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:25,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:25,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:25,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:25,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:25,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256605296] [2023-11-06 22:58:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256605296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:58:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908060214] [2023-11-06 22:58:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:26,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 304 [2023-11-06 22:58:26,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 177 transitions, 3001 flow. Second operand has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:26,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:26,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 304 [2023-11-06 22:58:26,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:26,964 INFO L124 PetriNetUnfolderBase]: 2229/3405 cut-off events. [2023-11-06 22:58:26,964 INFO L125 PetriNetUnfolderBase]: For 42429/42818 co-relation queries the response was YES. [2023-11-06 22:58:26,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21263 conditions, 3405 events. 2229/3405 cut-off events. For 42429/42818 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 17704 event pairs, 584 based on Foata normal form. 397/3778 useless extension candidates. Maximal degree in co-relation 18914. Up to 2150 conditions per place. [2023-11-06 22:58:27,009 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 73 selfloop transitions, 133 changer transitions 8/217 dead transitions. [2023-11-06 22:58:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 217 transitions, 3849 flow [2023-11-06 22:58:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 976 transitions. [2023-11-06 22:58:27,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-11-06 22:58:27,016 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 976 transitions. [2023-11-06 22:58:27,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 976 transitions. [2023-11-06 22:58:27,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:27,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 976 transitions. [2023-11-06 22:58:27,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.42857142857142) internal successors, (976), 7 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 22:58:27,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:27,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:27,029 INFO L175 Difference]: Start difference. First operand has 98 places, 177 transitions, 3001 flow. Second operand 7 states and 976 transitions. [2023-11-06 22:58:27,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 217 transitions, 3849 flow [2023-11-06 22:58:27,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 217 transitions, 3730 flow, removed 40 selfloop flow, removed 5 redundant places. [2023-11-06 22:58:27,180 INFO L231 Difference]: Finished difference. Result has 98 places, 181 transitions, 3259 flow [2023-11-06 22:58:27,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3259, PETRI_PLACES=98, PETRI_TRANSITIONS=181} [2023-11-06 22:58:27,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2023-11-06 22:58:27,185 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 181 transitions, 3259 flow [2023-11-06 22:58:27,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:27,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:27,187 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 22:58:27,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:27,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:27,399 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 22:58:27,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 42704130, now seen corresponding path program 7 times [2023-11-06 22:58:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:27,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830216576] [2023-11-06 22:58:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:58:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:27,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:27,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:27,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:58:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:27,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:27,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:27,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:27,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830216576] [2023-11-06 22:58:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830216576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:27,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:58:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901365667] [2023-11-06 22:58:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:28,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 304 [2023-11-06 22:58:28,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 181 transitions, 3259 flow. Second operand has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:28,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 304 [2023-11-06 22:58:28,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:28,890 INFO L124 PetriNetUnfolderBase]: 1882/2847 cut-off events. [2023-11-06 22:58:28,890 INFO L125 PetriNetUnfolderBase]: For 36562/36801 co-relation queries the response was YES. [2023-11-06 22:58:28,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18330 conditions, 2847 events. 1882/2847 cut-off events. For 36562/36801 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14264 event pairs, 472 based on Foata normal form. 257/3069 useless extension candidates. Maximal degree in co-relation 15292. Up to 2178 conditions per place. [2023-11-06 22:58:28,910 INFO L140 encePairwiseOnDemand]: 296/304 looper letters, 165 selfloop transitions, 41 changer transitions 22/230 dead transitions. [2023-11-06 22:58:28,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 230 transitions, 4259 flow [2023-11-06 22:58:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 976 transitions. [2023-11-06 22:58:28,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-11-06 22:58:28,915 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 976 transitions. [2023-11-06 22:58:28,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 976 transitions. [2023-11-06 22:58:28,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:28,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 976 transitions. [2023-11-06 22:58:28,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.42857142857142) internal successors, (976), 7 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 22:58:28,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:28,925 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:28,925 INFO L175 Difference]: Start difference. First operand has 98 places, 181 transitions, 3259 flow. Second operand 7 states and 976 transitions. [2023-11-06 22:58:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 230 transitions, 4259 flow [2023-11-06 22:58:29,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 230 transitions, 4030 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-11-06 22:58:29,032 INFO L231 Difference]: Finished difference. Result has 99 places, 176 transitions, 3079 flow [2023-11-06 22:58:29,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3079, PETRI_PLACES=99, PETRI_TRANSITIONS=176} [2023-11-06 22:58:29,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2023-11-06 22:58:29,033 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 176 transitions, 3079 flow [2023-11-06 22:58:29,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:29,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:29,033 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 22:58:29,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:29,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:29,234 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 22:58:29,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -535458564, now seen corresponding path program 6 times [2023-11-06 22:58:29,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:29,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799165497] [2023-11-06 22:58:29,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:58:29,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:29,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:29,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:58:29,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:58:29,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:29,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:58:29,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:29,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:29,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799165497] [2023-11-06 22:58:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799165497] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 22:58:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142464065] [2023-11-06 22:58:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:29,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:29,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:29,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-06 22:58:29,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 176 transitions, 3079 flow. Second operand has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:29,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:29,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-06 22:58:29,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:30,796 INFO L124 PetriNetUnfolderBase]: 1654/2449 cut-off events. [2023-11-06 22:58:30,796 INFO L125 PetriNetUnfolderBase]: For 29405/29665 co-relation queries the response was YES. [2023-11-06 22:58:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15732 conditions, 2449 events. 1654/2449 cut-off events. For 29405/29665 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11773 event pairs, 336 based on Foata normal form. 252/2696 useless extension candidates. Maximal degree in co-relation 13651. Up to 1238 conditions per place. [2023-11-06 22:58:30,814 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 164 selfloop transitions, 81 changer transitions 26/274 dead transitions. [2023-11-06 22:58:30,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 274 transitions, 4952 flow [2023-11-06 22:58:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:58:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 973 transitions. [2023-11-06 22:58:30,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2023-11-06 22:58:30,819 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 973 transitions. [2023-11-06 22:58:30,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 973 transitions. [2023-11-06 22:58:30,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:30,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 973 transitions. [2023-11-06 22:58:30,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 22:58:30,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:30,827 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 304.0) internal successors, (2432), 8 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 22:58:30,827 INFO L175 Difference]: Start difference. First operand has 99 places, 176 transitions, 3079 flow. Second operand 7 states and 973 transitions. [2023-11-06 22:58:30,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 274 transitions, 4952 flow [2023-11-06 22:58:30,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 274 transitions, 4698 flow, removed 80 selfloop flow, removed 6 redundant places. [2023-11-06 22:58:30,948 INFO L231 Difference]: Finished difference. Result has 99 places, 194 transitions, 3572 flow [2023-11-06 22:58:30,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3572, PETRI_PLACES=99, PETRI_TRANSITIONS=194} [2023-11-06 22:58:30,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2023-11-06 22:58:30,949 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 194 transitions, 3572 flow [2023-11-06 22:58:30,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 22:58:30,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:30,949 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 22:58:30,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:31,150 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 22:58:31,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 257159693, now seen corresponding path program 1 times [2023-11-06 22:58:31,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:31,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025507550] [2023-11-06 22:58:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:31,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:31,152 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:31,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:58:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:31,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:31,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:31,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:31,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:31,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025507550] [2023-11-06 22:58:31,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025507550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:31,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:31,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:58:31,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970099604] [2023-11-06 22:58:31,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:31,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:32,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-11-06 22:58:32,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 194 transitions, 3572 flow. Second operand has 14 states, 14 states have (on average 125.5) internal successors, (1757), 14 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states 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 22:58:32,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:32,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-11-06 22:58:32,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:34,733 INFO L124 PetriNetUnfolderBase]: 2826/4045 cut-off events. [2023-11-06 22:58:34,734 INFO L125 PetriNetUnfolderBase]: For 43965/44014 co-relation queries the response was YES. [2023-11-06 22:58:34,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25829 conditions, 4045 events. 2826/4045 cut-off events. For 43965/44014 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19046 event pairs, 777 based on Foata normal form. 45/4057 useless extension candidates. Maximal degree in co-relation 23298. Up to 1838 conditions per place. [2023-11-06 22:58:34,770 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 448 selfloop transitions, 48 changer transitions 0/516 dead transitions. [2023-11-06 22:58:34,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 516 transitions, 9135 flow [2023-11-06 22:58:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:58:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:58:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1842 transitions. [2023-11-06 22:58:34,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43280075187969924 [2023-11-06 22:58:34,777 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1842 transitions. [2023-11-06 22:58:34,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1842 transitions. [2023-11-06 22:58:34,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:34,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1842 transitions. [2023-11-06 22:58:34,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 131.57142857142858) internal successors, (1842), 14 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states 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 22:58:34,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 304.0) internal successors, (4560), 15 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states 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 22:58:34,789 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 304.0) internal successors, (4560), 15 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states 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 22:58:34,790 INFO L175 Difference]: Start difference. First operand has 99 places, 194 transitions, 3572 flow. Second operand 14 states and 1842 transitions. [2023-11-06 22:58:34,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 516 transitions, 9135 flow [2023-11-06 22:58:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 516 transitions, 7954 flow, removed 164 selfloop flow, removed 13 redundant places. [2023-11-06 22:58:34,967 INFO L231 Difference]: Finished difference. Result has 95 places, 226 transitions, 3514 flow [2023-11-06 22:58:34,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3514, PETRI_PLACES=95, PETRI_TRANSITIONS=226} [2023-11-06 22:58:34,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2023-11-06 22:58:34,968 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 226 transitions, 3514 flow [2023-11-06 22:58:34,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.5) internal successors, (1757), 14 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states 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 22:58:34,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:34,969 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 22:58:34,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:35,169 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 22:58:35,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1559601201, now seen corresponding path program 2 times [2023-11-06 22:58:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187700310] [2023-11-06 22:58:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:35,172 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:35,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:58:35,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:35,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:35,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:35,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:35,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:35,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:35,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187700310] [2023-11-06 22:58:35,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187700310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:35,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:35,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:58:35,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574065268] [2023-11-06 22:58:35,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:35,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:35,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:36,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-11-06 22:58:36,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 226 transitions, 3514 flow. Second operand has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:36,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:36,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-11-06 22:58:36,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:38,298 INFO L124 PetriNetUnfolderBase]: 2849/4086 cut-off events. [2023-11-06 22:58:38,298 INFO L125 PetriNetUnfolderBase]: For 38887/38952 co-relation queries the response was YES. [2023-11-06 22:58:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25134 conditions, 4086 events. 2849/4086 cut-off events. For 38887/38952 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19352 event pairs, 757 based on Foata normal form. 51/4081 useless extension candidates. Maximal degree in co-relation 22026. Up to 1870 conditions per place. [2023-11-06 22:58:38,333 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 432 selfloop transitions, 58 changer transitions 0/510 dead transitions. [2023-11-06 22:58:38,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 510 transitions, 8232 flow [2023-11-06 22:58:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:58:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:58:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1834 transitions. [2023-11-06 22:58:38,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309210526315789 [2023-11-06 22:58:38,337 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1834 transitions. [2023-11-06 22:58:38,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1834 transitions. [2023-11-06 22:58:38,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:38,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1834 transitions. [2023-11-06 22:58:38,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 131.0) internal successors, (1834), 14 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:38,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 304.0) internal successors, (4560), 15 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states 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 22:58:38,346 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 304.0) internal successors, (4560), 15 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states 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 22:58:38,346 INFO L175 Difference]: Start difference. First operand has 95 places, 226 transitions, 3514 flow. Second operand 14 states and 1834 transitions. [2023-11-06 22:58:38,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 510 transitions, 8232 flow [2023-11-06 22:58:38,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 510 transitions, 8173 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-06 22:58:38,478 INFO L231 Difference]: Finished difference. Result has 108 places, 247 transitions, 3924 flow [2023-11-06 22:58:38,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3924, PETRI_PLACES=108, PETRI_TRANSITIONS=247} [2023-11-06 22:58:38,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2023-11-06 22:58:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 247 transitions, 3924 flow [2023-11-06 22:58:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:38,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:38,480 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 22:58:38,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:38,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:38,690 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 22:58:38,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -470878155, now seen corresponding path program 3 times [2023-11-06 22:58:38,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:38,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904535033] [2023-11-06 22:58:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:38,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:38,692 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:38,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:58:38,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:58:38,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:38,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:38,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:39,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:39,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904535033] [2023-11-06 22:58:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904535033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:39,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:58:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461120650] [2023-11-06 22:58:39,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:39,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:40,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-11-06 22:58:40,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 247 transitions, 3924 flow. Second operand has 14 states, 14 states have (on average 125.85714285714286) internal successors, (1762), 14 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 22:58:40,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:40,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-11-06 22:58:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:43,365 INFO L124 PetriNetUnfolderBase]: 3065/4421 cut-off events. [2023-11-06 22:58:43,365 INFO L125 PetriNetUnfolderBase]: For 48929/48981 co-relation queries the response was YES. [2023-11-06 22:58:43,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28257 conditions, 4421 events. 3065/4421 cut-off events. For 48929/48981 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21284 event pairs, 762 based on Foata normal form. 45/4442 useless extension candidates. Maximal degree in co-relation 24306. Up to 2019 conditions per place. [2023-11-06 22:58:43,406 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 483 selfloop transitions, 99 changer transitions 0/602 dead transitions. [2023-11-06 22:58:43,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 602 transitions, 9616 flow [2023-11-06 22:58:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:58:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:58:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2370 transitions. [2023-11-06 22:58:43,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331140350877193 [2023-11-06 22:58:43,412 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2370 transitions. [2023-11-06 22:58:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2370 transitions. [2023-11-06 22:58:43,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:43,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2370 transitions. [2023-11-06 22:58:43,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 131.66666666666666) internal successors, (2370), 18 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states 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 22:58:43,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states 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 22:58:43,427 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states 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 22:58:43,427 INFO L175 Difference]: Start difference. First operand has 108 places, 247 transitions, 3924 flow. Second operand 18 states and 2370 transitions. [2023-11-06 22:58:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 602 transitions, 9616 flow [2023-11-06 22:58:43,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 602 transitions, 9394 flow, removed 65 selfloop flow, removed 6 redundant places. [2023-11-06 22:58:43,644 INFO L231 Difference]: Finished difference. Result has 125 places, 291 transitions, 4799 flow [2023-11-06 22:58:43,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=3843, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4799, PETRI_PLACES=125, PETRI_TRANSITIONS=291} [2023-11-06 22:58:43,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2023-11-06 22:58:43,645 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 291 transitions, 4799 flow [2023-11-06 22:58:43,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.85714285714286) internal successors, (1762), 14 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 22:58:43,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:43,646 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 22:58:43,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:43,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:43,847 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 22:58:43,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1513069513, now seen corresponding path program 4 times [2023-11-06 22:58:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634066496] [2023-11-06 22:58:43,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:58:43,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:43,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:43,849 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:43,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:58:44,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:58:44,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:44,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:44,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:44,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:44,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634066496] [2023-11-06 22:58:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634066496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:44,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:58:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765322419] [2023-11-06 22:58:44,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:44,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:45,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-11-06 22:58:45,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 291 transitions, 4799 flow. Second operand has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:45,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:45,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-11-06 22:58:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:48,209 INFO L124 PetriNetUnfolderBase]: 3038/4387 cut-off events. [2023-11-06 22:58:48,209 INFO L125 PetriNetUnfolderBase]: For 52875/52946 co-relation queries the response was YES. [2023-11-06 22:58:48,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29319 conditions, 4387 events. 3038/4387 cut-off events. For 52875/52946 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21263 event pairs, 735 based on Foata normal form. 53/4385 useless extension candidates. Maximal degree in co-relation 26304. Up to 2030 conditions per place. [2023-11-06 22:58:48,266 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 470 selfloop transitions, 122 changer transitions 0/612 dead transitions. [2023-11-06 22:58:48,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 612 transitions, 10195 flow [2023-11-06 22:58:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:58:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:58:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2364 transitions. [2023-11-06 22:58:48,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43201754385964913 [2023-11-06 22:58:48,274 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2364 transitions. [2023-11-06 22:58:48,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2364 transitions. [2023-11-06 22:58:48,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:48,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2364 transitions. [2023-11-06 22:58:48,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 131.33333333333334) internal successors, (2364), 18 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 22:58:48,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states 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 22:58:48,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 304.0) internal successors, (5776), 19 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states 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 22:58:48,293 INFO L175 Difference]: Start difference. First operand has 125 places, 291 transitions, 4799 flow. Second operand 18 states and 2364 transitions. [2023-11-06 22:58:48,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 612 transitions, 10195 flow [2023-11-06 22:58:48,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 612 transitions, 10000 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-11-06 22:58:48,539 INFO L231 Difference]: Finished difference. Result has 139 places, 335 transitions, 5772 flow [2023-11-06 22:58:48,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5772, PETRI_PLACES=139, PETRI_TRANSITIONS=335} [2023-11-06 22:58:48,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2023-11-06 22:58:48,540 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 335 transitions, 5772 flow [2023-11-06 22:58:48,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:48,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:48,540 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 22:58:48,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:48,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,752 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 22:58:48,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash -404540325, now seen corresponding path program 5 times [2023-11-06 22:58:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859979030] [2023-11-06 22:58:48,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:58:48,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:48,755 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:58:48,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:48,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:58:48,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:49,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:49,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859979030] [2023-11-06 22:58:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859979030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:49,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:49,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-11-06 22:58:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510049007] [2023-11-06 22:58:49,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:58:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:58:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:58:50,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 304 [2023-11-06 22:58:50,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 335 transitions, 5772 flow. Second operand has 17 states, 17 states have (on average 122.3529411764706) internal successors, (2080), 17 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 22:58:50,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:50,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 304 [2023-11-06 22:58:50,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:54,197 INFO L124 PetriNetUnfolderBase]: 3869/5468 cut-off events. [2023-11-06 22:58:54,197 INFO L125 PetriNetUnfolderBase]: For 61314/61314 co-relation queries the response was YES. [2023-11-06 22:58:54,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36889 conditions, 5468 events. 3869/5468 cut-off events. For 61314/61314 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25729 event pairs, 452 based on Foata normal form. 44/5512 useless extension candidates. Maximal degree in co-relation 33963. Up to 2453 conditions per place. [2023-11-06 22:58:54,251 INFO L140 encePairwiseOnDemand]: 292/304 looper letters, 194 selfloop transitions, 377 changer transitions 0/571 dead transitions. [2023-11-06 22:58:54,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 571 transitions, 9735 flow [2023-11-06 22:58:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:58:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:58:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2939 transitions. [2023-11-06 22:58:54,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420337528604119 [2023-11-06 22:58:54,259 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2939 transitions. [2023-11-06 22:58:54,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2939 transitions. [2023-11-06 22:58:54,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:54,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2939 transitions. [2023-11-06 22:58:54,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 127.78260869565217) internal successors, (2939), 23 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states 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 22:58:54,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 304.0) internal successors, (7296), 24 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states 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 22:58:54,278 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 304.0) internal successors, (7296), 24 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states 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 22:58:54,278 INFO L175 Difference]: Start difference. First operand has 139 places, 335 transitions, 5772 flow. Second operand 23 states and 2939 transitions. [2023-11-06 22:58:54,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 571 transitions, 9735 flow [2023-11-06 22:58:54,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 571 transitions, 9264 flow, removed 125 selfloop flow, removed 10 redundant places. [2023-11-06 22:58:54,611 INFO L231 Difference]: Finished difference. Result has 154 places, 473 transitions, 8387 flow [2023-11-06 22:58:54,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=5434, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8387, PETRI_PLACES=154, PETRI_TRANSITIONS=473} [2023-11-06 22:58:54,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-11-06 22:58:54,612 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 473 transitions, 8387 flow [2023-11-06 22:58:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.3529411764706) internal successors, (2080), 17 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 22:58:54,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:54,613 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 22:58:54,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:54,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:54,813 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 22:58:54,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash 315055559, now seen corresponding path program 6 times [2023-11-06 22:58:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562163310] [2023-11-06 22:58:54,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:58:54,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:54,815 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:58:54,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:58:54,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:54,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:54,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:55,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:55,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:55,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562163310] [2023-11-06 22:58:55,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562163310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:55,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:55,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:58:55,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521330698] [2023-11-06 22:58:55,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:55,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:55,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:55,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:56,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-11-06 22:58:56,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 473 transitions, 8387 flow. Second operand has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:56,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:56,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-11-06 22:58:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:59,388 INFO L124 PetriNetUnfolderBase]: 3755/5297 cut-off events. [2023-11-06 22:58:59,388 INFO L125 PetriNetUnfolderBase]: For 72028/72084 co-relation queries the response was YES. [2023-11-06 22:58:59,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 5297 events. 3755/5297 cut-off events. For 72028/72084 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24937 event pairs, 811 based on Foata normal form. 53/5325 useless extension candidates. Maximal degree in co-relation 36965. Up to 2439 conditions per place. [2023-11-06 22:58:59,445 INFO L140 encePairwiseOnDemand]: 295/304 looper letters, 571 selfloop transitions, 173 changer transitions 0/771 dead transitions. [2023-11-06 22:58:59,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 771 transitions, 13941 flow [2023-11-06 22:58:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:58:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:58:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2098 transitions. [2023-11-06 22:58:59,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43133223684210525 [2023-11-06 22:58:59,449 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2098 transitions. [2023-11-06 22:58:59,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2098 transitions. [2023-11-06 22:58:59,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:59,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2098 transitions. [2023-11-06 22:58:59,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 131.125) internal successors, (2098), 16 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states 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 22:58:59,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 304.0) internal successors, (5168), 17 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states 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 22:58:59,462 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 304.0) internal successors, (5168), 17 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states 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 22:58:59,462 INFO L175 Difference]: Start difference. First operand has 154 places, 473 transitions, 8387 flow. Second operand 16 states and 2098 transitions. [2023-11-06 22:58:59,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 771 transitions, 13941 flow [2023-11-06 22:58:59,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 771 transitions, 12347 flow, removed 330 selfloop flow, removed 5 redundant places. [2023-11-06 22:58:59,952 INFO L231 Difference]: Finished difference. Result has 165 places, 477 transitions, 7916 flow [2023-11-06 22:58:59,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7916, PETRI_PLACES=165, PETRI_TRANSITIONS=477} [2023-11-06 22:58:59,953 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2023-11-06 22:58:59,953 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 477 transitions, 7916 flow [2023-11-06 22:58:59,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.71428571428571) internal successors, (1760), 14 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 22:58:59,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:59,953 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] [2023-11-06 22:58:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:00,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 22:59:00,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash -184022761, now seen corresponding path program 1 times [2023-11-06 22:59:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:59:00,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857548669] [2023-11-06 22:59:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:00,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:00,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:59:00,156 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:59:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b83fb8c-3f53-42a8-8be3-05d3961f6826/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:59:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:00,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:59:00,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:00,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2023-11-06 22:59:00,839 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 22:59:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:01,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:59:01,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:59:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:02,005 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:02,011 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:02,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 19 [2023-11-06 22:59:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:02,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:04,229 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:59:04,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 2422 treesize of output 1970 [2023-11-06 22:59:04,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:04,290 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 475 treesize of output 367 [2023-11-06 22:59:04,701 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:59:04,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 367 treesize of output 324 [2023-11-06 22:59:04,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:04,781 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 168 treesize of output 114