./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/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_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/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_3facc2ea-ae8d-410c-a6c4-470e5af13b38/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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:42,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:42,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:37:42,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:42,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:42,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:42,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:42,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:42,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:42,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:42,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:42,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:42,336 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:42,337 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:42,338 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:37:42,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:42,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:42,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:42,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:42,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:37:42,343 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:42,344 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:37:42,344 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:42,345 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:37:42,346 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:42,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:42,348 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:42,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:42,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:42,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:42,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:42,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:37:42,352 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:42,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:42,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:42,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:37:42,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:42,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:42,355 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:42,355 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_3facc2ea-ae8d-410c-a6c4-470e5af13b38/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2023-11-06 22:37:42,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:42,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:42,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:42,733 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:42,734 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:42,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-06 22:37:46,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:37:46,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:37:46,367 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-06 22:37:46,382 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/data/8e8a45eac/4cd3e8d51e064e60a008b91bebc19b73/FLAG48a80f2e6 [2023-11-06 22:37:46,405 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/data/8e8a45eac/4cd3e8d51e064e60a008b91bebc19b73 [2023-11-06 22:37:46,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:37:46,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:37:46,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:46,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:37:46,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:37:46,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1126eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46, skipping insertion in model container [2023-11-06 22:37:46,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:37:46,718 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_3facc2ea-ae8d-410c-a6c4-470e5af13b38/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2023-11-06 22:37:46,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:46,742 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:37:46,770 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_3facc2ea-ae8d-410c-a6c4-470e5af13b38/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2023-11-06 22:37:46,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:46,793 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:37:46,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46 WrapperNode [2023-11-06 22:37:46,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:46,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:46,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:37:46,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:37:46,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,844 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-11-06 22:37:46,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:46,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:37:46,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:37:46,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:37:46,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,875 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,880 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:37:46,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:37:46,882 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:37:46,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:37:46,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (1/1) ... [2023-11-06 22:37:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:46,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:37:46,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:37:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:37:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:37:46,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:37:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:37:46,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:37:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:37:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:37:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:37:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:37:46,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:37:46,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:37:46,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:37:46,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:37:46,976 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 22:37:47,142 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:37:47,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:37:47,511 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:37:47,522 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:37:47,522 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:37:47,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:47 BoogieIcfgContainer [2023-11-06 22:37:47,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:37:47,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:37:47,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:37:47,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:37:47,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:46" (1/3) ... [2023-11-06 22:37:47,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4155c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:47, skipping insertion in model container [2023-11-06 22:37:47,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:46" (2/3) ... [2023-11-06 22:37:47,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4155c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:47, skipping insertion in model container [2023-11-06 22:37:47,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:47" (3/3) ... [2023-11-06 22:37:47,536 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-11-06 22:37:47,546 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:37:47,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:37:47,559 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:37:47,559 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:37:47,656 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:37:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 384 flow [2023-11-06 22:37:47,806 INFO L124 PetriNetUnfolderBase]: 15/183 cut-off events. [2023-11-06 22:37:47,810 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:37:47,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-11-06 22:37:47,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 384 flow [2023-11-06 22:37:47,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2023-11-06 22:37:47,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:37:47,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 174 transitions, 360 flow [2023-11-06 22:37:47,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 174 transitions, 360 flow [2023-11-06 22:37:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 360 flow [2023-11-06 22:37:47,932 INFO L124 PetriNetUnfolderBase]: 15/174 cut-off events. [2023-11-06 22:37:47,932 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:37:47,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-11-06 22:37:47,941 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2023-11-06 22:37:53,888 INFO L134 LiptonReduction]: Checked pairs total: 2781 [2023-11-06 22:37:53,888 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-11-06 22:37:53,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:37:53,913 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;@35ffde46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:37:53,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:37:53,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:37:53,920 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:37:53,920 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:37:53,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:53,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:53,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:53,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1654189979, now seen corresponding path program 1 times [2023-11-06 22:37:53,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:53,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778170910] [2023-11-06 22:37:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:53,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:54,368 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 22:37:54,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:54,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778170910] [2023-11-06 22:37:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778170910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:54,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:54,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:37:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518044693] [2023-11-06 22:37:54,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:54,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:37:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:37:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:37:54,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 388 [2023-11-06 22:37:54,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:54,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 388 [2023-11-06 22:37:54,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:54,565 INFO L124 PetriNetUnfolderBase]: 66/116 cut-off events. [2023-11-06 22:37:54,566 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:37:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 327 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-06 22:37:54,571 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-11-06 22:37:54,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-11-06 22:37:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:37:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:37:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-06 22:37:54,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43986254295532645 [2023-11-06 22:37:54,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-06 22:37:54,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-06 22:37:54,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:54,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-06 22:37:54,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,626 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 512 transitions. [2023-11-06 22:37:54,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-11-06 22:37:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:37:54,632 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-06 22:37:54,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-06 22:37:54,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:37:54,640 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-06 22:37:54,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:54,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:54,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:37:54,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:54,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1601892901, now seen corresponding path program 1 times [2023-11-06 22:37:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:54,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693872766] [2023-11-06 22:37:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:54,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:54,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693872766] [2023-11-06 22:37:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693872766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:54,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:54,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:37:54,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097728130] [2023-11-06 22:37:54,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:37:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:37:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:37:54,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 388 [2023-11-06 22:37:54,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:54,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:54,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 388 [2023-11-06 22:37:54,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:55,005 INFO L124 PetriNetUnfolderBase]: 60/111 cut-off events. [2023-11-06 22:37:55,006 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:37:55,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 111 events. 60/111 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 310 event pairs, 28 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 103. Up to 106 conditions per place. [2023-11-06 22:37:55,012 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 16 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-06 22:37:55,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 95 flow [2023-11-06 22:37:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:37:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:37:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-11-06 22:37:55,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269759450171821 [2023-11-06 22:37:55,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-11-06 22:37:55,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-11-06 22:37:55,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:55,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-11-06 22:37:55,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,025 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 497 transitions. [2023-11-06 22:37:55,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 95 flow [2023-11-06 22:37:55,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:55,028 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-06 22:37:55,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-06 22:37:55,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-06 22:37:55,029 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-06 22:37:55,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:55,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:37:55,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:55,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1164455265, now seen corresponding path program 1 times [2023-11-06 22:37:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:55,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535732808] [2023-11-06 22:37:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,344 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 22:37:55,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535732808] [2023-11-06 22:37:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535732808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:55,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972756694] [2023-11-06 22:37:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:55,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:55,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:55,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:37:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:37:55,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:55,573 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 22:37:55,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:55,654 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 22:37:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972756694] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:55,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-06 22:37:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779903852] [2023-11-06 22:37:55,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:55,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:55,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:55,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 388 [2023-11-06 22:37:55,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:55,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 388 [2023-11-06 22:37:55,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:55,855 INFO L124 PetriNetUnfolderBase]: 76/137 cut-off events. [2023-11-06 22:37:55,855 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:37:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 137 events. 76/137 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 388 event pairs, 15 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 319. Up to 80 conditions per place. [2023-11-06 22:37:55,857 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 29 selfloop transitions, 4 changer transitions 1/35 dead transitions. [2023-11-06 22:37:55,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 35 transitions, 172 flow [2023-11-06 22:37:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:37:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:37:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 670 transitions. [2023-11-06 22:37:55,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43170103092783507 [2023-11-06 22:37:55,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 670 transitions. [2023-11-06 22:37:55,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 670 transitions. [2023-11-06 22:37:55,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:55,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 670 transitions. [2023-11-06 22:37:55,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.5) internal successors, (670), 4 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,871 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 670 transitions. [2023-11-06 22:37:55,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 35 transitions, 172 flow [2023-11-06 22:37:55,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 35 transitions, 168 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:55,873 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-06 22:37:55,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-06 22:37:55,874 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-06 22:37:55,874 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-06 22:37:55,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:55,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:55,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:55,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:56,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:56,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1158695077, now seen corresponding path program 1 times [2023-11-06 22:37:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299163679] [2023-11-06 22:37:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,339 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 22:37:56,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:56,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299163679] [2023-11-06 22:37:56,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299163679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:56,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726945308] [2023-11-06 22:37:56,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:56,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:56,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 388 [2023-11-06 22:37:56,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:56,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 388 [2023-11-06 22:37:56,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:56,573 INFO L124 PetriNetUnfolderBase]: 93/184 cut-off events. [2023-11-06 22:37:56,574 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-06 22:37:56,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 184 events. 93/184 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 626 event pairs, 26 based on Foata normal form. 12/195 useless extension candidates. Maximal degree in co-relation 490. Up to 101 conditions per place. [2023-11-06 22:37:56,576 INFO L140 encePairwiseOnDemand]: 383/388 looper letters, 33 selfloop transitions, 4 changer transitions 8/45 dead transitions. [2023-11-06 22:37:56,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 253 flow [2023-11-06 22:37:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:37:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2023-11-06 22:37:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42577319587628865 [2023-11-06 22:37:56,580 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2023-11-06 22:37:56,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2023-11-06 22:37:56,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:56,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2023-11-06 22:37:56,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,591 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,591 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 826 transitions. [2023-11-06 22:37:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 253 flow [2023-11-06 22:37:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 248 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:56,594 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2023-11-06 22:37:56,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-06 22:37:56,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-11-06 22:37:56,595 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2023-11-06 22:37:56,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:56,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:56,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:37:56,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:56,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1628044259, now seen corresponding path program 2 times [2023-11-06 22:37:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:56,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931001115] [2023-11-06 22:37:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:56,724 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 22:37:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931001115] [2023-11-06 22:37:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931001115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387850610] [2023-11-06 22:37:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:56,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:56,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:56,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:37:56,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:56,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:56,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:37:56,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:56,881 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 22:37:56,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:56,932 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 22:37:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387850610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:56,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:56,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 22:37:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952823412] [2023-11-06 22:37:56,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:37:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:37:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:37:57,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-11-06 22:37:57,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 8 states, 8 states have (on average 158.625) internal successors, (1269), 8 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:57,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-11-06 22:37:57,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:57,218 INFO L124 PetriNetUnfolderBase]: 117/232 cut-off events. [2023-11-06 22:37:57,218 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-11-06 22:37:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 232 events. 117/232 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 802 event pairs, 42 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 761. Up to 135 conditions per place. [2023-11-06 22:37:57,221 INFO L140 encePairwiseOnDemand]: 383/388 looper letters, 34 selfloop transitions, 11 changer transitions 6/51 dead transitions. [2023-11-06 22:37:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 338 flow [2023-11-06 22:37:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:37:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2023-11-06 22:37:57,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42422680412371133 [2023-11-06 22:37:57,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2023-11-06 22:37:57,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2023-11-06 22:37:57,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:57,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2023-11-06 22:37:57,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,235 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,236 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 5 states and 823 transitions. [2023-11-06 22:37:57,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 338 flow [2023-11-06 22:37:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 320 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:37:57,240 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 194 flow [2023-11-06 22:37:57,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-06 22:37:57,241 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-06 22:37:57,241 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 194 flow [2023-11-06 22:37:57,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.625) internal successors, (1269), 8 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:57,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:57,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:57,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:57,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:57,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:57,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1641477091, now seen corresponding path program 2 times [2023-11-06 22:37:57,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863000196] [2023-11-06 22:37:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:57,620 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 22:37:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863000196] [2023-11-06 22:37:57,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863000196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:57,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:57,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:37:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579615443] [2023-11-06 22:37:57,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:57,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:57,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:37:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 388 [2023-11-06 22:37:57,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:57,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 388 [2023-11-06 22:37:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:57,770 INFO L124 PetriNetUnfolderBase]: 115/228 cut-off events. [2023-11-06 22:37:57,770 INFO L125 PetriNetUnfolderBase]: For 541/554 co-relation queries the response was YES. [2023-11-06 22:37:57,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 228 events. 115/228 cut-off events. For 541/554 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 855 event pairs, 31 based on Foata normal form. 10/234 useless extension candidates. Maximal degree in co-relation 851. Up to 132 conditions per place. [2023-11-06 22:37:57,773 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 33 selfloop transitions, 10 changer transitions 0/45 dead transitions. [2023-11-06 22:37:57,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 348 flow [2023-11-06 22:37:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:37:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:37:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-11-06 22:37:57,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43556701030927836 [2023-11-06 22:37:57,777 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-11-06 22:37:57,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-11-06 22:37:57,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:57,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-11-06 22:37:57,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,785 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 194 flow. Second operand 4 states and 676 transitions. [2023-11-06 22:37:57,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 348 flow [2023-11-06 22:37:57,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 346 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:37:57,790 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 256 flow [2023-11-06 22:37:57,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-06 22:37:57,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-11-06 22:37:57,791 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 256 flow [2023-11-06 22:37:57,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:57,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:57,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:37:57,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:57,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash -692416105, now seen corresponding path program 3 times [2023-11-06 22:37:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:57,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72001945] [2023-11-06 22:37:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:57,905 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 22:37:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:57,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72001945] [2023-11-06 22:37:57,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72001945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:57,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:57,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:37:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659428896] [2023-11-06 22:37:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:57,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:37:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 388 [2023-11-06 22:37:57,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:57,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:57,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 388 [2023-11-06 22:37:57,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:58,062 INFO L124 PetriNetUnfolderBase]: 115/222 cut-off events. [2023-11-06 22:37:58,063 INFO L125 PetriNetUnfolderBase]: For 677/695 co-relation queries the response was YES. [2023-11-06 22:37:58,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 222 events. 115/222 cut-off events. For 677/695 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 798 event pairs, 32 based on Foata normal form. 8/226 useless extension candidates. Maximal degree in co-relation 930. Up to 134 conditions per place. [2023-11-06 22:37:58,065 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 31 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-06 22:37:58,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 401 flow [2023-11-06 22:37:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:37:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:37:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-11-06 22:37:58,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43556701030927836 [2023-11-06 22:37:58,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-11-06 22:37:58,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-11-06 22:37:58,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:58,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-11-06 22:37:58,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,077 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 256 flow. Second operand 4 states and 676 transitions. [2023-11-06 22:37:58,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 401 flow [2023-11-06 22:37:58,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 386 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:58,082 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 285 flow [2023-11-06 22:37:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-06 22:37:58,082 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-06 22:37:58,083 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 285 flow [2023-11-06 22:37:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:58,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:37:58,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:58,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -611558963, now seen corresponding path program 3 times [2023-11-06 22:37:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197269338] [2023-11-06 22:37:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:58,231 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 22:37:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197269338] [2023-11-06 22:37:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197269338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:58,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105806080] [2023-11-06 22:37:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:58,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-11-06 22:37:58,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:58,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-11-06 22:37:58,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:58,414 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-11-06 22:37:58,415 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2023-11-06 22:37:58,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 195 events. 106/195 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 584 event pairs, 34 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 847. Up to 149 conditions per place. [2023-11-06 22:37:58,418 INFO L140 encePairwiseOnDemand]: 383/388 looper letters, 31 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2023-11-06 22:37:58,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 415 flow [2023-11-06 22:37:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:37:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 810 transitions. [2023-11-06 22:37:58,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175257731958763 [2023-11-06 22:37:58,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 810 transitions. [2023-11-06 22:37:58,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 810 transitions. [2023-11-06 22:37:58,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:58,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 810 transitions. [2023-11-06 22:37:58,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,430 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,430 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 285 flow. Second operand 5 states and 810 transitions. [2023-11-06 22:37:58,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 415 flow [2023-11-06 22:37:58,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 383 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 22:37:58,435 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 301 flow [2023-11-06 22:37:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-06 22:37:58,436 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-06 22:37:58,436 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 301 flow [2023-11-06 22:37:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:58,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:37:58,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:58,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash 324449875, now seen corresponding path program 4 times [2023-11-06 22:37:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:58,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802361316] [2023-11-06 22:37:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:58,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:58,565 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 22:37:58,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:58,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802361316] [2023-11-06 22:37:58,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802361316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:58,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:58,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129822090] [2023-11-06 22:37:58,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:58,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 388 [2023-11-06 22:37:58,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 301 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:37:58,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 388 [2023-11-06 22:37:58,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:37:58,771 INFO L124 PetriNetUnfolderBase]: 100/181 cut-off events. [2023-11-06 22:37:58,771 INFO L125 PetriNetUnfolderBase]: For 711/711 co-relation queries the response was YES. [2023-11-06 22:37:58,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 181 events. 100/181 cut-off events. For 711/711 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 515 event pairs, 31 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 845. Up to 130 conditions per place. [2023-11-06 22:37:58,774 INFO L140 encePairwiseOnDemand]: 383/388 looper letters, 32 selfloop transitions, 9 changer transitions 4/45 dead transitions. [2023-11-06 22:37:58,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 433 flow [2023-11-06 22:37:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:37:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 815 transitions. [2023-11-06 22:37:58,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42010309278350516 [2023-11-06 22:37:58,778 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 815 transitions. [2023-11-06 22:37:58,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 815 transitions. [2023-11-06 22:37:58,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:37:58,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 815 transitions. [2023-11-06 22:37:58,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,788 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,788 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 301 flow. Second operand 5 states and 815 transitions. [2023-11-06 22:37:58,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 433 flow [2023-11-06 22:37:58,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 419 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:37:58,794 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 323 flow [2023-11-06 22:37:58,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-11-06 22:37:58,795 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-06 22:37:58,795 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 323 flow [2023-11-06 22:37:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:37:58,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:37:58,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:58,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:37:58,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:37:58,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash 566309643, now seen corresponding path program 1 times [2023-11-06 22:37:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765567364] [2023-11-06 22:37:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:59,296 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 22:37:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765567364] [2023-11-06 22:37:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765567364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885070756] [2023-11-06 22:37:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:59,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:59,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:59,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:37:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:59,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:37:59,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:59,696 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:37:59,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2023-11-06 22:37:59,770 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 22:37:59,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:00,007 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-11-06 22:38:00,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 87 [2023-11-06 22:38:00,347 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 22:38:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885070756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 17 [2023-11-06 22:38:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543681815] [2023-11-06 22:38:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:38:00,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:38:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:38:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 388 [2023-11-06 22:38:03,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 323 flow. Second operand has 17 states, 17 states have (on average 138.7058823529412) internal successors, (2358), 17 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:03,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:03,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 388 [2023-11-06 22:38:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:07,278 INFO L124 PetriNetUnfolderBase]: 353/634 cut-off events. [2023-11-06 22:38:07,279 INFO L125 PetriNetUnfolderBase]: For 2518/2518 co-relation queries the response was YES. [2023-11-06 22:38:07,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3095 conditions, 634 events. 353/634 cut-off events. For 2518/2518 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2811 event pairs, 24 based on Foata normal form. 10/642 useless extension candidates. Maximal degree in co-relation 3036. Up to 267 conditions per place. [2023-11-06 22:38:07,284 INFO L140 encePairwiseOnDemand]: 377/388 looper letters, 59 selfloop transitions, 33 changer transitions 105/197 dead transitions. [2023-11-06 22:38:07,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 197 transitions, 1725 flow [2023-11-06 22:38:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:38:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:38:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4390 transitions. [2023-11-06 22:38:07,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.364981709344862 [2023-11-06 22:38:07,302 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4390 transitions. [2023-11-06 22:38:07,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4390 transitions. [2023-11-06 22:38:07,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:07,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4390 transitions. [2023-11-06 22:38:07,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 141.61290322580646) internal successors, (4390), 31 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 388.0) internal successors, (12416), 32 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,346 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 388.0) internal successors, (12416), 32 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,346 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 323 flow. Second operand 31 states and 4390 transitions. [2023-11-06 22:38:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 197 transitions, 1725 flow [2023-11-06 22:38:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 197 transitions, 1605 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-06 22:38:07,362 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 585 flow [2023-11-06 22:38:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=585, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2023-11-06 22:38:07,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2023-11-06 22:38:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 585 flow [2023-11-06 22:38:07,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 138.7058823529412) internal successors, (2358), 17 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:07,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:07,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:38:07,572 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:07,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -182898053, now seen corresponding path program 2 times [2023-11-06 22:38:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152445233] [2023-11-06 22:38:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:08,807 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 22:38:08,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:08,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152445233] [2023-11-06 22:38:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152445233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:08,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565012343] [2023-11-06 22:38:08,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:08,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:08,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:08,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:08,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:38:08,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:08,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:38:08,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:38:09,240 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 22:38:09,327 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:38:09,327 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 15 [2023-11-06 22:38:09,389 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 22:38:09,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:11,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:11,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 172 [2023-11-06 22:38:11,689 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:11,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 72 [2023-11-06 22:38:12,084 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 22:38:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565012343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:12,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:12,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-11-06 22:38:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77666601] [2023-11-06 22:38:12,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:38:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:38:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=287, Unknown=2, NotChecked=0, Total=342 [2023-11-06 22:38:14,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:38:16,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:38:19,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:38:21,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:38:22,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 388 [2023-11-06 22:38:22,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 585 flow. Second operand has 19 states, 19 states have (on average 106.3157894736842) internal successors, (2020), 19 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:22,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:22,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 388 [2023-11-06 22:38:22,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:26,489 INFO L124 PetriNetUnfolderBase]: 199/362 cut-off events. [2023-11-06 22:38:26,489 INFO L125 PetriNetUnfolderBase]: For 2445/2445 co-relation queries the response was YES. [2023-11-06 22:38:26,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 362 events. 199/362 cut-off events. For 2445/2445 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1290 event pairs, 26 based on Foata normal form. 30/391 useless extension candidates. Maximal degree in co-relation 2183. Up to 159 conditions per place. [2023-11-06 22:38:26,494 INFO L140 encePairwiseOnDemand]: 379/388 looper letters, 42 selfloop transitions, 21 changer transitions 39/102 dead transitions. [2023-11-06 22:38:26,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 102 transitions, 1149 flow [2023-11-06 22:38:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:38:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:38:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1962 transitions. [2023-11-06 22:38:26,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2809278350515464 [2023-11-06 22:38:26,503 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1962 transitions. [2023-11-06 22:38:26,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1962 transitions. [2023-11-06 22:38:26,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:26,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1962 transitions. [2023-11-06 22:38:26,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.0) internal successors, (1962), 18 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,525 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,525 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 585 flow. Second operand 18 states and 1962 transitions. [2023-11-06 22:38:26,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 102 transitions, 1149 flow [2023-11-06 22:38:26,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 940 flow, removed 86 selfloop flow, removed 17 redundant places. [2023-11-06 22:38:26,548 INFO L231 Difference]: Finished difference. Result has 74 places, 44 transitions, 419 flow [2023-11-06 22:38:26,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=419, PETRI_PLACES=74, PETRI_TRANSITIONS=44} [2023-11-06 22:38:26,549 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2023-11-06 22:38:26,549 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 44 transitions, 419 flow [2023-11-06 22:38:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.3157894736842) internal successors, (2020), 19 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:26,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:26,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:38:26,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:26,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -165934973, now seen corresponding path program 3 times [2023-11-06 22:38:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887113574] [2023-11-06 22:38:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:38:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887113574] [2023-11-06 22:38:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887113574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032633739] [2023-11-06 22:38:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:38:27,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:27,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:27,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:38:27,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:38:27,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:27,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:38:27,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:38:27,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:38:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032633739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:27,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:27,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:38:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295805116] [2023-11-06 22:38:27,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:27,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:38:27,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:38:27,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:38:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 388 [2023-11-06 22:38:28,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 44 transitions, 419 flow. Second operand has 12 states, 12 states have (on average 163.41666666666666) internal successors, (1961), 12 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:28,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:28,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 388 [2023-11-06 22:38:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:32,080 INFO L124 PetriNetUnfolderBase]: 241/427 cut-off events. [2023-11-06 22:38:32,080 INFO L125 PetriNetUnfolderBase]: For 1774/1786 co-relation queries the response was YES. [2023-11-06 22:38:32,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 427 events. 241/427 cut-off events. For 1774/1786 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1579 event pairs, 14 based on Foata normal form. 54/476 useless extension candidates. Maximal degree in co-relation 2311. Up to 221 conditions per place. [2023-11-06 22:38:32,089 INFO L140 encePairwiseOnDemand]: 383/388 looper letters, 85 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2023-11-06 22:38:32,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 115 transitions, 1193 flow [2023-11-06 22:38:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:38:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:38:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1840 transitions. [2023-11-06 22:38:32,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311152764761012 [2023-11-06 22:38:32,106 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1840 transitions. [2023-11-06 22:38:32,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1840 transitions. [2023-11-06 22:38:32,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:32,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1840 transitions. [2023-11-06 22:38:32,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.27272727272728) internal successors, (1840), 11 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:32,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 388.0) internal successors, (4656), 12 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:32,129 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 388.0) internal successors, (4656), 12 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:32,129 INFO L175 Difference]: Start difference. First operand has 74 places, 44 transitions, 419 flow. Second operand 11 states and 1840 transitions. [2023-11-06 22:38:32,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 115 transitions, 1193 flow [2023-11-06 22:38:32,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 1147 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-06 22:38:32,143 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 576 flow [2023-11-06 22:38:32,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=576, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2023-11-06 22:38:32,146 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-06 22:38:32,147 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 576 flow [2023-11-06 22:38:32,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.41666666666666) internal successors, (1961), 12 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:32,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:32,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:32,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:38:32,355 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:32,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1022584245, now seen corresponding path program 4 times [2023-11-06 22:38:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:32,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208986707] [2023-11-06 22:38:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208986707] [2023-11-06 22:38:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208986707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052941622] [2023-11-06 22:38:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:38:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:34,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:38:35,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:38:35,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:35,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:38:35,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:35,374 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:35,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:38:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:35,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:35,759 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-06 22:38:35,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-06 22:38:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:38:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052941622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:36,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-11-06 22:38:36,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537072706] [2023-11-06 22:38:36,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:36,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:38:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:38:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:38:38,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 388 [2023-11-06 22:38:38,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 576 flow. Second operand has 20 states, 20 states have (on average 143.15) internal successors, (2863), 20 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:38,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:38,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 388 [2023-11-06 22:38:38,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:39,793 INFO L124 PetriNetUnfolderBase]: 617/1095 cut-off events. [2023-11-06 22:38:39,793 INFO L125 PetriNetUnfolderBase]: For 5435/5462 co-relation queries the response was YES. [2023-11-06 22:38:39,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6196 conditions, 1095 events. 617/1095 cut-off events. For 5435/5462 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5038 event pairs, 47 based on Foata normal form. 17/1099 useless extension candidates. Maximal degree in co-relation 5800. Up to 533 conditions per place. [2023-11-06 22:38:39,807 INFO L140 encePairwiseOnDemand]: 381/388 looper letters, 102 selfloop transitions, 85 changer transitions 2/196 dead transitions. [2023-11-06 22:38:39,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 196 transitions, 2207 flow [2023-11-06 22:38:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:38:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:38:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3077 transitions. [2023-11-06 22:38:39,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763868433971526 [2023-11-06 22:38:39,819 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3077 transitions. [2023-11-06 22:38:39,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3077 transitions. [2023-11-06 22:38:39,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:39,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3077 transitions. [2023-11-06 22:38:39,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 146.52380952380952) internal successors, (3077), 21 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:39,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:39,846 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:39,847 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 576 flow. Second operand 21 states and 3077 transitions. [2023-11-06 22:38:39,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 196 transitions, 2207 flow [2023-11-06 22:38:39,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 196 transitions, 1901 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-11-06 22:38:39,869 INFO L231 Difference]: Finished difference. Result has 86 places, 131 transitions, 1474 flow [2023-11-06 22:38:39,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1474, PETRI_PLACES=86, PETRI_TRANSITIONS=131} [2023-11-06 22:38:39,870 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-06 22:38:39,870 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 131 transitions, 1474 flow [2023-11-06 22:38:39,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 143.15) internal successors, (2863), 20 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:39,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:39,871 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:39,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:38:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:38:40,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:40,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1132334347, now seen corresponding path program 5 times [2023-11-06 22:38:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:40,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020928013] [2023-11-06 22:38:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:40,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020928013] [2023-11-06 22:38:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020928013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521698015] [2023-11-06 22:38:42,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:38:42,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:42,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:42,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:42,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:38:42,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:38:42,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:42,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:38:42,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:42,617 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:42,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:38:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:42,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:43,037 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-06 22:38:43,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-06 22:38:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:38:43,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521698015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:43,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-11-06 22:38:43,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590167057] [2023-11-06 22:38:43,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:43,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:38:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:38:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:38:46,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 388 [2023-11-06 22:38:46,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 131 transitions, 1474 flow. Second operand has 21 states, 21 states have (on average 148.04761904761904) internal successors, (3109), 21 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:46,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:46,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 388 [2023-11-06 22:38:46,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:48,585 INFO L124 PetriNetUnfolderBase]: 1011/1803 cut-off events. [2023-11-06 22:38:48,586 INFO L125 PetriNetUnfolderBase]: For 8752/8781 co-relation queries the response was YES. [2023-11-06 22:38:48,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10020 conditions, 1803 events. 1011/1803 cut-off events. For 8752/8781 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9426 event pairs, 154 based on Foata normal form. 17/1806 useless extension candidates. Maximal degree in co-relation 9338. Up to 1014 conditions per place. [2023-11-06 22:38:48,610 INFO L140 encePairwiseOnDemand]: 381/388 looper letters, 145 selfloop transitions, 106 changer transitions 2/260 dead transitions. [2023-11-06 22:38:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 260 transitions, 3062 flow [2023-11-06 22:38:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:38:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:38:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3040 transitions. [2023-11-06 22:38:48,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917525773195876 [2023-11-06 22:38:48,617 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3040 transitions. [2023-11-06 22:38:48,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3040 transitions. [2023-11-06 22:38:48,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:48,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3040 transitions. [2023-11-06 22:38:48,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 152.0) internal successors, (3040), 20 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 22:38:48,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:48,638 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:48,638 INFO L175 Difference]: Start difference. First operand has 86 places, 131 transitions, 1474 flow. Second operand 20 states and 3040 transitions. [2023-11-06 22:38:48,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 260 transitions, 3062 flow [2023-11-06 22:38:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 260 transitions, 2643 flow, removed 206 selfloop flow, removed 4 redundant places. [2023-11-06 22:38:48,677 INFO L231 Difference]: Finished difference. Result has 106 places, 189 transitions, 2116 flow [2023-11-06 22:38:48,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2116, PETRI_PLACES=106, PETRI_TRANSITIONS=189} [2023-11-06 22:38:48,678 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2023-11-06 22:38:48,678 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 189 transitions, 2116 flow [2023-11-06 22:38:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 148.04761904761904) internal successors, (3109), 21 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:48,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:48,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:48,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:48,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:38:48,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:48,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1941986087, now seen corresponding path program 6 times [2023-11-06 22:38:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58759207] [2023-11-06 22:38:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:51,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58759207] [2023-11-06 22:38:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58759207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557625579] [2023-11-06 22:38:51,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:38:51,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:51,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:51,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:38:51,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:38:51,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:51,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:38:51,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:51,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:51,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:38:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:51,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:52,074 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-06 22:38:52,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-06 22:38:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:38:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557625579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:52,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:52,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-11-06 22:38:52,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682568688] [2023-11-06 22:38:52,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:52,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:38:52,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:38:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:38:54,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 388 [2023-11-06 22:38:54,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 189 transitions, 2116 flow. Second operand has 20 states, 20 states have (on average 144.15) internal successors, (2883), 20 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:54,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 388 [2023-11-06 22:38:54,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:55,840 INFO L124 PetriNetUnfolderBase]: 1363/2425 cut-off events. [2023-11-06 22:38:55,840 INFO L125 PetriNetUnfolderBase]: For 12276/12319 co-relation queries the response was YES. [2023-11-06 22:38:55,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13470 conditions, 2425 events. 1363/2425 cut-off events. For 12276/12319 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13509 event pairs, 229 based on Foata normal form. 27/2438 useless extension candidates. Maximal degree in co-relation 13422. Up to 1649 conditions per place. [2023-11-06 22:38:55,872 INFO L140 encePairwiseOnDemand]: 381/388 looper letters, 180 selfloop transitions, 101 changer transitions 1/289 dead transitions. [2023-11-06 22:38:55,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 289 transitions, 3585 flow [2023-11-06 22:38:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:38:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:38:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2794 transitions. [2023-11-06 22:38:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37900162778079216 [2023-11-06 22:38:55,878 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2794 transitions. [2023-11-06 22:38:55,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2794 transitions. [2023-11-06 22:38:55,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:55,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2794 transitions. [2023-11-06 22:38:55,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.05263157894737) internal successors, (2794), 19 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:55,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:55,896 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:55,897 INFO L175 Difference]: Start difference. First operand has 106 places, 189 transitions, 2116 flow. Second operand 19 states and 2794 transitions. [2023-11-06 22:38:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 289 transitions, 3585 flow [2023-11-06 22:38:55,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 289 transitions, 3278 flow, removed 126 selfloop flow, removed 10 redundant places. [2023-11-06 22:38:55,954 INFO L231 Difference]: Finished difference. Result has 118 places, 239 transitions, 2826 flow [2023-11-06 22:38:55,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2826, PETRI_PLACES=118, PETRI_TRANSITIONS=239} [2023-11-06 22:38:55,956 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-11-06 22:38:55,956 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 239 transitions, 2826 flow [2023-11-06 22:38:55,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.15) internal successors, (2883), 20 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:55,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:55,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:55,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:56,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:38:56,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:38:56,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1977272077, now seen corresponding path program 7 times [2023-11-06 22:38:56,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:56,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451826883] [2023-11-06 22:38:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:56,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:58,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:58,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451826883] [2023-11-06 22:38:58,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451826883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:58,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992094611] [2023-11-06 22:38:58,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:38:58,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:58,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:58,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:38:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:58,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:38:58,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:58,552 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:38:58,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:38:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:58,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:58,874 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-11-06 22:38:58,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-11-06 22:38:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:38:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992094611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:59,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-11-06 22:38:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274185385] [2023-11-06 22:38:59,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:38:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:38:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:39:01,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 388 [2023-11-06 22:39:01,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 239 transitions, 2826 flow. Second operand has 20 states, 20 states have (on average 144.15) internal successors, (2883), 20 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:01,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:01,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 388 [2023-11-06 22:39:01,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:03,186 INFO L124 PetriNetUnfolderBase]: 1867/3321 cut-off events. [2023-11-06 22:39:03,187 INFO L125 PetriNetUnfolderBase]: For 16907/16954 co-relation queries the response was YES. [2023-11-06 22:39:03,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18411 conditions, 3321 events. 1867/3321 cut-off events. For 16907/16954 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19750 event pairs, 375 based on Foata normal form. 32/3337 useless extension candidates. Maximal degree in co-relation 18358. Up to 2249 conditions per place. [2023-11-06 22:39:03,232 INFO L140 encePairwiseOnDemand]: 382/388 looper letters, 259 selfloop transitions, 113 changer transitions 2/381 dead transitions. [2023-11-06 22:39:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 381 transitions, 4865 flow [2023-11-06 22:39:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:39:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:39:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3094 transitions. [2023-11-06 22:39:03,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797250859106529 [2023-11-06 22:39:03,313 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3094 transitions. [2023-11-06 22:39:03,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3094 transitions. [2023-11-06 22:39:03,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:03,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3094 transitions. [2023-11-06 22:39:03,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 147.33333333333334) internal successors, (3094), 21 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,335 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,335 INFO L175 Difference]: Start difference. First operand has 118 places, 239 transitions, 2826 flow. Second operand 21 states and 3094 transitions. [2023-11-06 22:39:03,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 381 transitions, 4865 flow [2023-11-06 22:39:03,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 381 transitions, 4640 flow, removed 93 selfloop flow, removed 8 redundant places. [2023-11-06 22:39:03,443 INFO L231 Difference]: Finished difference. Result has 138 places, 316 transitions, 4003 flow [2023-11-06 22:39:03,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4003, PETRI_PLACES=138, PETRI_TRANSITIONS=316} [2023-11-06 22:39:03,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2023-11-06 22:39:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 316 transitions, 4003 flow [2023-11-06 22:39:03,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.15) internal successors, (2883), 20 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:03,445 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:03,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:39:03,652 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:03,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1668990425, now seen corresponding path program 8 times [2023-11-06 22:39:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737093324] [2023-11-06 22:39:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:03,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:05,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:05,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737093324] [2023-11-06 22:39:05,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737093324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:05,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867845852] [2023-11-06 22:39:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:05,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:05,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:05,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:39:05,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:05,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:05,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:39:05,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:06,032 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 22:39:06,188 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:06,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:39:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:06,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:06,340 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))) is different from false [2023-11-06 22:39:06,459 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:06,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-11-06 22:39:06,554 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:06,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-11-06 22:39:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:39:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867845852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:07,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:07,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-06 22:39:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622200665] [2023-11-06 22:39:07,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:39:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:39:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=444, Unknown=1, NotChecked=42, Total=552 [2023-11-06 22:39:07,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 388 [2023-11-06 22:39:07,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 316 transitions, 4003 flow. Second operand has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:07,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:07,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 388 [2023-11-06 22:39:07,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:10,829 INFO L124 PetriNetUnfolderBase]: 2398/4263 cut-off events. [2023-11-06 22:39:10,829 INFO L125 PetriNetUnfolderBase]: For 27524/27583 co-relation queries the response was YES. [2023-11-06 22:39:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25271 conditions, 4263 events. 2398/4263 cut-off events. For 27524/27583 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26747 event pairs, 403 based on Foata normal form. 41/4285 useless extension candidates. Maximal degree in co-relation 25209. Up to 2380 conditions per place. [2023-11-06 22:39:10,873 INFO L140 encePairwiseOnDemand]: 378/388 looper letters, 249 selfloop transitions, 227 changer transitions 3/486 dead transitions. [2023-11-06 22:39:10,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 486 transitions, 6753 flow [2023-11-06 22:39:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:39:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:39:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2730 transitions. [2023-11-06 22:39:10,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3198219306466729 [2023-11-06 22:39:10,881 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2730 transitions. [2023-11-06 22:39:10,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2730 transitions. [2023-11-06 22:39:10,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:10,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2730 transitions. [2023-11-06 22:39:10,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 124.0909090909091) internal successors, (2730), 22 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:10,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:10,901 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:10,901 INFO L175 Difference]: Start difference. First operand has 138 places, 316 transitions, 4003 flow. Second operand 22 states and 2730 transitions. [2023-11-06 22:39:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 486 transitions, 6753 flow [2023-11-06 22:39:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 486 transitions, 6402 flow, removed 149 selfloop flow, removed 8 redundant places. [2023-11-06 22:39:11,049 INFO L231 Difference]: Finished difference. Result has 157 places, 409 transitions, 5725 flow [2023-11-06 22:39:11,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5725, PETRI_PLACES=157, PETRI_TRANSITIONS=409} [2023-11-06 22:39:11,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-11-06 22:39:11,050 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 409 transitions, 5725 flow [2023-11-06 22:39:11,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:11,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:11,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:11,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:39:11,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:11,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash -912711251, now seen corresponding path program 9 times [2023-11-06 22:39:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:11,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357465470] [2023-11-06 22:39:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357465470] [2023-11-06 22:39:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357465470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393545394] [2023-11-06 22:39:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:13,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:13,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:39:13,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:39:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:13,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:39:13,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:13,921 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 22 treesize of output 15 [2023-11-06 22:39:14,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:14,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:39:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:14,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:14,132 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_375) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) is different from false [2023-11-06 22:39:14,141 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_375) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))) (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))))) is different from false [2023-11-06 22:39:14,261 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:14,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-11-06 22:39:14,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:14,324 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-11-06 22:39:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-11-06 22:39:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393545394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:15,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:15,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-06 22:39:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868780263] [2023-11-06 22:39:15,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:15,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:39:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:39:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=400, Unknown=2, NotChecked=82, Total=552 [2023-11-06 22:39:15,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 388 [2023-11-06 22:39:15,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 409 transitions, 5725 flow. Second operand has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:15,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:15,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 388 [2023-11-06 22:39:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:18,368 INFO L124 PetriNetUnfolderBase]: 3013/5356 cut-off events. [2023-11-06 22:39:18,368 INFO L125 PetriNetUnfolderBase]: For 44272/44340 co-relation queries the response was YES. [2023-11-06 22:39:18,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 5356 events. 3013/5356 cut-off events. For 44272/44340 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35588 event pairs, 588 based on Foata normal form. 49/5391 useless extension candidates. Maximal degree in co-relation 35892. Up to 3977 conditions per place. [2023-11-06 22:39:18,422 INFO L140 encePairwiseOnDemand]: 378/388 looper letters, 369 selfloop transitions, 232 changer transitions 3/611 dead transitions. [2023-11-06 22:39:18,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 611 transitions, 9611 flow [2023-11-06 22:39:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:39:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:39:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2848 transitions. [2023-11-06 22:39:18,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3191393993724787 [2023-11-06 22:39:18,428 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2848 transitions. [2023-11-06 22:39:18,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2848 transitions. [2023-11-06 22:39:18,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:18,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2848 transitions. [2023-11-06 22:39:18,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 123.82608695652173) internal successors, (2848), 23 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:18,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:18,443 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:18,443 INFO L175 Difference]: Start difference. First operand has 157 places, 409 transitions, 5725 flow. Second operand 23 states and 2848 transitions. [2023-11-06 22:39:18,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 611 transitions, 9611 flow [2023-11-06 22:39:18,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 611 transitions, 9017 flow, removed 269 selfloop flow, removed 7 redundant places. [2023-11-06 22:39:18,682 INFO L231 Difference]: Finished difference. Result has 182 places, 544 transitions, 8273 flow [2023-11-06 22:39:18,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8273, PETRI_PLACES=182, PETRI_TRANSITIONS=544} [2023-11-06 22:39:18,683 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2023-11-06 22:39:18,683 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 544 transitions, 8273 flow [2023-11-06 22:39:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:18,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:18,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:18,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:18,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:39:18,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:18,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1547195585, now seen corresponding path program 10 times [2023-11-06 22:39:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:18,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396627082] [2023-11-06 22:39:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396627082] [2023-11-06 22:39:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396627082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617206616] [2023-11-06 22:39:20,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:20,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:20,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:20,564 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:20,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:39:20,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:20,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:39:20,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:20,903 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 22:39:21,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:21,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-11-06 22:39:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:21,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:21,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:21,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 286 treesize of output 334 [2023-11-06 22:39:21,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:21,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 168 [2023-11-06 22:39:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:24,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617206616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:24,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:39:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859795187] [2023-11-06 22:39:24,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:39:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:39:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=608, Unknown=1, NotChecked=0, Total=702 [2023-11-06 22:39:26,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:29,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:31,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:33,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:37,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:39,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:40,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 388 [2023-11-06 22:39:40,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 544 transitions, 8273 flow. Second operand has 27 states, 27 states have (on average 119.55555555555556) internal successors, (3228), 27 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:40,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:40,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 388 [2023-11-06 22:39:40,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:40,710 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_~x1~0 4))) (let ((.cse7 (select |c_#memory_int| c_~f~0.base)) (.cse3 (+ .cse8 c_~f~0.offset))) (let ((.cse4 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse6 (select .cse7 .cse3))) (and (forall ((v_ArrVal_404 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_404) c_~f~0.base))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 .cse4))))) (.cse2 (select .cse0 .cse3))) (or (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ c_~f~0.offset (* .cse2 4)))) (< .cse1 0) (< .cse2 0) (< c_~size~0 (+ .cse1 1)) (< c_~size~0 (+ .cse2 1)))))) (let ((.cse5 (select .cse7 (+ (* (select .cse7 .cse4) 4) c_~f~0.offset)))) (or (< c_~size~0 (+ .cse5 1)) (< c_~size~0 (+ .cse6 1)) (< .cse5 0) (< .cse6 0) (= (select .cse7 (+ c_~f~0.offset (* 4 .cse5))) (select .cse7 (+ c_~f~0.offset (* .cse6 4)))))) (or (< 0 (+ c_~f~0.offset 1)) (< 0 (+ .cse8 c_~f~0.offset 1))) (let ((.cse9 (= c_~x1~0 0))) (or (and (or (< (+ (* c_~size~0 4) c_~f~0.offset) 9) (< .cse3 5)) (or (let ((.cse10 (= .cse3 4))) (and (not .cse9) (or (< c_~x1~0 1) .cse10) (or (= c_~x2~0 .cse6) (not .cse10)))) (< 4 .cse3))) (and (= (select .cse7 0) c_~x2~0) (<= c_~f~0.offset 0) .cse9))))))) is different from false [2023-11-06 22:39:43,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:45,487 INFO L124 PetriNetUnfolderBase]: 3475/6222 cut-off events. [2023-11-06 22:39:45,487 INFO L125 PetriNetUnfolderBase]: For 86706/86791 co-relation queries the response was YES. [2023-11-06 22:39:45,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51700 conditions, 6222 events. 3475/6222 cut-off events. For 86706/86791 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 42882 event pairs, 605 based on Foata normal form. 46/6236 useless extension candidates. Maximal degree in co-relation 51038. Up to 4448 conditions per place. [2023-11-06 22:39:45,549 INFO L140 encePairwiseOnDemand]: 379/388 looper letters, 482 selfloop transitions, 239 changer transitions 2/730 dead transitions. [2023-11-06 22:39:45,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 730 transitions, 12389 flow [2023-11-06 22:39:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:39:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:39:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2843 transitions. [2023-11-06 22:39:45,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185791125056029 [2023-11-06 22:39:45,555 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2843 transitions. [2023-11-06 22:39:45,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2843 transitions. [2023-11-06 22:39:45,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:45,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2843 transitions. [2023-11-06 22:39:45,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 123.6086956521739) internal successors, (2843), 23 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:45,570 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:45,570 INFO L175 Difference]: Start difference. First operand has 182 places, 544 transitions, 8273 flow. Second operand 23 states and 2843 transitions. [2023-11-06 22:39:45,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 730 transitions, 12389 flow [2023-11-06 22:39:45,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 730 transitions, 11744 flow, removed 290 selfloop flow, removed 8 redundant places. [2023-11-06 22:39:45,890 INFO L231 Difference]: Finished difference. Result has 203 places, 659 transitions, 10449 flow [2023-11-06 22:39:45,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=7668, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10449, PETRI_PLACES=203, PETRI_TRANSITIONS=659} [2023-11-06 22:39:45,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2023-11-06 22:39:45,891 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 659 transitions, 10449 flow [2023-11-06 22:39:45,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 119.55555555555556) internal successors, (3228), 27 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:45,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:45,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:45,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:46,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:46,092 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:46,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1658259525, now seen corresponding path program 11 times [2023-11-06 22:39:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:46,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334546193] [2023-11-06 22:39:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:48,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334546193] [2023-11-06 22:39:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334546193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267608688] [2023-11-06 22:39:48,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:48,095 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:48,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:39:48,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:39:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:48,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:39:48,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:48,476 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 22:39:48,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:48,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-11-06 22:39:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:48,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:48,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:48,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-11-06 22:39:49,075 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:39:49,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-11-06 22:39:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:39:50,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267608688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:50,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:50,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-06 22:39:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125465495] [2023-11-06 22:39:50,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:39:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:39:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=488, Unknown=1, NotChecked=0, Total=552 [2023-11-06 22:39:52,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:54,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:39:58,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:00,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:02,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:02,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 388 [2023-11-06 22:40:02,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 659 transitions, 10449 flow. Second operand has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:02,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:02,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 388 [2023-11-06 22:40:02,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:06,886 INFO L124 PetriNetUnfolderBase]: 3741/6696 cut-off events. [2023-11-06 22:40:06,887 INFO L125 PetriNetUnfolderBase]: For 108681/108777 co-relation queries the response was YES. [2023-11-06 22:40:06,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58764 conditions, 6696 events. 3741/6696 cut-off events. For 108681/108777 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46875 event pairs, 737 based on Foata normal form. 62/6743 useless extension candidates. Maximal degree in co-relation 58020. Up to 5179 conditions per place. [2023-11-06 22:40:06,958 INFO L140 encePairwiseOnDemand]: 382/388 looper letters, 534 selfloop transitions, 234 changer transitions 2/777 dead transitions. [2023-11-06 22:40:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 777 transitions, 13798 flow [2023-11-06 22:40:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:40:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:40:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2592 transitions. [2023-11-06 22:40:06,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181148748159057 [2023-11-06 22:40:06,964 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2592 transitions. [2023-11-06 22:40:06,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2592 transitions. [2023-11-06 22:40:06,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:06,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2592 transitions. [2023-11-06 22:40:06,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 123.42857142857143) internal successors, (2592), 21 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:06,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:06,977 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:06,978 INFO L175 Difference]: Start difference. First operand has 203 places, 659 transitions, 10449 flow. Second operand 21 states and 2592 transitions. [2023-11-06 22:40:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 777 transitions, 13798 flow [2023-11-06 22:40:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 777 transitions, 13418 flow, removed 142 selfloop flow, removed 10 redundant places. [2023-11-06 22:40:07,370 INFO L231 Difference]: Finished difference. Result has 219 places, 710 transitions, 11862 flow [2023-11-06 22:40:07,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=10071, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11862, PETRI_PLACES=219, PETRI_TRANSITIONS=710} [2023-11-06 22:40:07,371 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2023-11-06 22:40:07,371 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 710 transitions, 11862 flow [2023-11-06 22:40:07,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.79166666666667) internal successors, (2875), 24 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:07,372 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:07,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 22:40:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:07,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:07,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1983909705, now seen corresponding path program 12 times [2023-11-06 22:40:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471183218] [2023-11-06 22:40:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471183218] [2023-11-06 22:40:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471183218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513260471] [2023-11-06 22:40:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:40:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:09,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:09,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:40:09,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:40:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:09,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:40:09,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:09,949 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 14 treesize of output 12 [2023-11-06 22:40:10,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 22:40:10,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 22:40:10,310 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 38 treesize of output 27 [2023-11-06 22:40:10,560 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-06 22:40:10,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2023-11-06 22:40:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:10,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:11,560 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:11,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 480 treesize of output 276 [2023-11-06 22:40:11,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:11,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 1706 treesize of output 1602 [2023-11-06 22:40:12,193 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:12,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 454 treesize of output 446 [2023-11-06 22:40:12,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:12,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 229 [2023-11-06 22:40:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513260471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:38,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-11-06 22:40:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136624203] [2023-11-06 22:40:38,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:40:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:40:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=631, Unknown=1, NotChecked=0, Total=756 [2023-11-06 22:40:43,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:44,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 388 [2023-11-06 22:40:44,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 710 transitions, 11862 flow. Second operand has 28 states, 28 states have (on average 119.75) internal successors, (3353), 28 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:44,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:44,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 388 [2023-11-06 22:40:44,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:46,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:50,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:53,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:55,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:57,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:40:59,873 INFO L124 PetriNetUnfolderBase]: 4086/7323 cut-off events. [2023-11-06 22:40:59,873 INFO L125 PetriNetUnfolderBase]: For 130985/131077 co-relation queries the response was YES. [2023-11-06 22:40:59,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65930 conditions, 7323 events. 4086/7323 cut-off events. For 130985/131077 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52303 event pairs, 923 based on Foata normal form. 49/7351 useless extension candidates. Maximal degree in co-relation 64588. Up to 5741 conditions per place. [2023-11-06 22:40:59,952 INFO L140 encePairwiseOnDemand]: 381/388 looper letters, 594 selfloop transitions, 240 changer transitions 2/843 dead transitions. [2023-11-06 22:40:59,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 843 transitions, 15577 flow [2023-11-06 22:40:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:40:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:40:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2719 transitions. [2023-11-06 22:40:59,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185332708528585 [2023-11-06 22:40:59,958 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2719 transitions. [2023-11-06 22:40:59,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2719 transitions. [2023-11-06 22:40:59,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:59,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2719 transitions. [2023-11-06 22:40:59,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 123.5909090909091) internal successors, (2719), 22 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:59,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:59,973 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:59,973 INFO L175 Difference]: Start difference. First operand has 219 places, 710 transitions, 11862 flow. Second operand 22 states and 2719 transitions. [2023-11-06 22:40:59,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 843 transitions, 15577 flow [2023-11-06 22:41:00,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 843 transitions, 15205 flow, removed 138 selfloop flow, removed 10 redundant places. [2023-11-06 22:41:00,486 INFO L231 Difference]: Finished difference. Result has 237 places, 770 transitions, 13475 flow [2023-11-06 22:41:00,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=11493, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13475, PETRI_PLACES=237, PETRI_TRANSITIONS=770} [2023-11-06 22:41:00,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-11-06 22:41:00,488 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 770 transitions, 13475 flow [2023-11-06 22:41:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 119.75) internal successors, (3353), 28 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:00,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:00,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:00,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:41:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:41:00,689 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:00,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1364888325, now seen corresponding path program 13 times [2023-11-06 22:41:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:00,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412756350] [2023-11-06 22:41:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:00,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412756350] [2023-11-06 22:41:00,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412756350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:00,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418190669] [2023-11-06 22:41:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:41:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:00,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3facc2ea-ae8d-410c-a6c4-470e5af13b38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:41:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:01,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:41:01,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:01,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:03,368 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_7 Int)) (or (< v_z_7 0) (< (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) v_z_7) (< 0 (+ (div (* 8589934593 v_z_7) 4294967296) (div (+ 3 (* (- 8589934593) v_z_7)) 4294967296) 1)))) is different from false