./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:28,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:28,880 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:02:28,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:28,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:28,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:28,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:28,929 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:28,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:28,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:28,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:28,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:28,938 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:28,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:28,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:02:28,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:28,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:28,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:28,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:28,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:02:28,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:28,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:02:28,945 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:28,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:02:28,946 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:28,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:28,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:28,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:28,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:28,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:28,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:28,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:02:28,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:28,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:28,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:28,953 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:02:28,953 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:28,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:28,953 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:28,954 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_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2023-11-19 08:02:29,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:29,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:29,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:29,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:29,322 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:29,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-19 08:02:32,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:32,800 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:32,800 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-19 08:02:32,809 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/data/c8b8f6ba5/9f2c6cf0618a43788cc33df3757b4f1b/FLAG4028fc242 [2023-11-19 08:02:32,834 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/data/c8b8f6ba5/9f2c6cf0618a43788cc33df3757b4f1b [2023-11-19 08:02:32,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:32,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:32,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:32,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:32,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:32,849 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c0aef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:32, skipping insertion in model container [2023-11-19 08:02:32,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:32" (1/1) ... [2023-11-19 08:02:32,881 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:33,083 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_c4f37843-535c-498c-8d6f-d1b176725647/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-19 08:02:33,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:33,099 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:33,119 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_c4f37843-535c-498c-8d6f-d1b176725647/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-19 08:02:33,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:33,135 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:33,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33 WrapperNode [2023-11-19 08:02:33,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:33,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:33,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:33,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:33,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,169 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-19 08:02:33,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:33,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:33,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:33,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:33,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:33,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:33,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:33,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:33,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (1/1) ... [2023-11-19 08:02:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:33,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:33,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:33,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:02:33,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:02:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:02:33,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:02:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:02:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:02:33,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:33,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:02:33,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:02:33,280 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:02:33,385 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:33,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:33,590 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:33,599 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:33,600 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:02:33,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:33 BoogieIcfgContainer [2023-11-19 08:02:33,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:33,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:33,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:33,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:33,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:32" (1/3) ... [2023-11-19 08:02:33,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54996d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:33, skipping insertion in model container [2023-11-19 08:02:33,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:33" (2/3) ... [2023-11-19 08:02:33,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54996d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:33, skipping insertion in model container [2023-11-19 08:02:33,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:33" (3/3) ... [2023-11-19 08:02:33,614 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-19 08:02:33,623 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:02:33,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:33,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:02:33,634 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:02:33,702 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:02:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 82 transitions, 178 flow [2023-11-19 08:02:33,845 INFO L124 PetriNetUnfolderBase]: 5/80 cut-off events. [2023-11-19 08:02:33,845 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:02:33,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 5/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-19 08:02:33,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 82 transitions, 178 flow [2023-11-19 08:02:33,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 71 transitions, 154 flow [2023-11-19 08:02:33,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:02:33,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 71 transitions, 154 flow [2023-11-19 08:02:33,891 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 71 transitions, 154 flow [2023-11-19 08:02:33,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 71 transitions, 154 flow [2023-11-19 08:02:33,932 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2023-11-19 08:02:33,932 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:02:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-19 08:02:33,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-19 08:02:36,171 INFO L134 LiptonReduction]: Checked pairs total: 584 [2023-11-19 08:02:36,171 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-19 08:02:36,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:36,216 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a1b0ab1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:36,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:02:36,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:36,230 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 08:02:36,230 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:02:36,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:36,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:36,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:36,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash 977748267, now seen corresponding path program 1 times [2023-11-19 08:02:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062527179] [2023-11-19 08:02:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:36,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062527179] [2023-11-19 08:02:36,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062527179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:36,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:36,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:02:36,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621993945] [2023-11-19 08:02:36,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:36,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:37,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 145 [2023-11-19 08:02:37,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:37,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:37,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 145 [2023-11-19 08:02:37,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:37,159 INFO L124 PetriNetUnfolderBase]: 74/134 cut-off events. [2023-11-19 08:02:37,159 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 08:02:37,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 74/134 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 354 event pairs, 24 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-19 08:02:37,163 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-11-19 08:02:37,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 129 flow [2023-11-19 08:02:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-19 08:02:37,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609195402298851 [2023-11-19 08:02:37,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-19 08:02:37,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-19 08:02:37,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:37,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-19 08:02:37,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:37,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:37,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:37,209 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 244 transitions. [2023-11-19 08:02:37,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 129 flow [2023-11-19 08:02:37,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:02:37,215 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-19 08:02:37,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-19 08:02:37,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-19 08:02:37,224 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-19 08:02:37,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:37,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:37,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:37,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:02:37,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:37,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:37,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1653099630, now seen corresponding path program 1 times [2023-11-19 08:02:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:37,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042124547] [2023-11-19 08:02:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:37,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:37,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042124547] [2023-11-19 08:02:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042124547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:37,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416851124] [2023-11-19 08:02:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:37,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:37,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:37,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:37,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:02:37,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:38,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416851124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:38,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 11 [2023-11-19 08:02:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455429329] [2023-11-19 08:02:38,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:02:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:02:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:02:38,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:02:38,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 13 states, 13 states have (on average 58.61538461538461) internal successors, (762), 13 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:38,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:38,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:02:38,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:39,059 INFO L124 PetriNetUnfolderBase]: 94/171 cut-off events. [2023-11-19 08:02:39,059 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 08:02:39,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 171 events. 94/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 548 event pairs, 2 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 128. Up to 75 conditions per place. [2023-11-19 08:02:39,063 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 24 selfloop transitions, 5 changer transitions 26/55 dead transitions. [2023-11-19 08:02:39,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 55 transitions, 261 flow [2023-11-19 08:02:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:02:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:02:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 504 transitions. [2023-11-19 08:02:39,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2023-11-19 08:02:39,074 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 504 transitions. [2023-11-19 08:02:39,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 504 transitions. [2023-11-19 08:02:39,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:39,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 504 transitions. [2023-11-19 08:02:39,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.0) internal successors, (504), 8 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:39,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:39,091 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:39,092 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 8 states and 504 transitions. [2023-11-19 08:02:39,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 55 transitions, 261 flow [2023-11-19 08:02:39,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:39,095 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 86 flow [2023-11-19 08:02:39,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-11-19 08:02:39,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-11-19 08:02:39,096 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 86 flow [2023-11-19 08:02:39,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.61538461538461) internal successors, (762), 13 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:39,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:39,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:39,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:39,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 08:02:39,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:39,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash 616861472, now seen corresponding path program 1 times [2023-11-19 08:02:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597589688] [2023-11-19 08:02:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597589688] [2023-11-19 08:02:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597589688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728014497] [2023-11-19 08:02:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:39,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:39,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:39,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:39,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:02:39,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:39,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728014497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:39,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-19 08:02:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644056295] [2023-11-19 08:02:39,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:02:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:02:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:02:40,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-11-19 08:02:40,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 19 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 66.11111111111111) internal successors, (595), 9 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:40,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:40,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-11-19 08:02:40,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:40,187 INFO L124 PetriNetUnfolderBase]: 59/111 cut-off events. [2023-11-19 08:02:40,187 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-19 08:02:40,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 111 events. 59/111 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 249 event pairs, 11 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 353. Up to 73 conditions per place. [2023-11-19 08:02:40,190 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 20 selfloop transitions, 6 changer transitions 10/36 dead transitions. [2023-11-19 08:02:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 223 flow [2023-11-19 08:02:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:02:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 414 transitions. [2023-11-19 08:02:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2023-11-19 08:02:40,193 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 414 transitions. [2023-11-19 08:02:40,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 414 transitions. [2023-11-19 08:02:40,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:40,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 414 transitions. [2023-11-19 08:02:40,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:40,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:40,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:40,200 INFO L175 Difference]: Start difference. First operand has 31 places, 19 transitions, 86 flow. Second operand 6 states and 414 transitions. [2023-11-19 08:02:40,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 223 flow [2023-11-19 08:02:40,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 187 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-19 08:02:40,203 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 94 flow [2023-11-19 08:02:40,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-19 08:02:40,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-19 08:02:40,205 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 94 flow [2023-11-19 08:02:40,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.11111111111111) internal successors, (595), 9 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:40,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:40,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:40,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:40,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:40,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 448537604, now seen corresponding path program 2 times [2023-11-19 08:02:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:40,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305652130] [2023-11-19 08:02:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:40,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305652130] [2023-11-19 08:02:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305652130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783432369] [2023-11-19 08:02:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:40,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:40,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:40,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:40,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:40,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:02:40,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:40,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783432369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:41,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:41,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-11-19 08:02:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813696891] [2023-11-19 08:02:41,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:02:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:02:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:02:41,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-11-19 08:02:41,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 94 flow. Second operand has 14 states, 14 states have (on average 59.5) internal successors, (833), 14 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:41,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:41,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-11-19 08:02:41,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:41,542 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-11-19 08:02:41,543 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-19 08:02:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 211 events. 113/211 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 667 event pairs, 9 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 601. Up to 92 conditions per place. [2023-11-19 08:02:41,546 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 41 selfloop transitions, 19 changer transitions 12/72 dead transitions. [2023-11-19 08:02:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 72 transitions, 397 flow [2023-11-19 08:02:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:02:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 08:02:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 701 transitions. [2023-11-19 08:02:41,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394984326018809 [2023-11-19 08:02:41,555 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 701 transitions. [2023-11-19 08:02:41,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 701 transitions. [2023-11-19 08:02:41,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:41,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 701 transitions. [2023-11-19 08:02:41,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:41,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:41,563 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:41,564 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 94 flow. Second operand 11 states and 701 transitions. [2023-11-19 08:02:41,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 72 transitions, 397 flow [2023-11-19 08:02:41,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 72 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:41,568 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 198 flow [2023-11-19 08:02:41,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-19 08:02:41,569 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-11-19 08:02:41,569 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 198 flow [2023-11-19 08:02:41,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.5) internal successors, (833), 14 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:41,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:41,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:41,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:41,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:41,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash -418143370, now seen corresponding path program 3 times [2023-11-19 08:02:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191534971] [2023-11-19 08:02:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:42,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191534971] [2023-11-19 08:02:42,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191534971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:42,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336145360] [2023-11-19 08:02:42,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:02:42,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:42,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:42,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:42,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:02:42,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:02:42,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:42,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:02:42,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:42,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336145360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:42,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:42,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-11-19 08:02:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051740538] [2023-11-19 08:02:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:42,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:02:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:02:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:02:42,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-11-19 08:02:42,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 198 flow. Second operand has 13 states, 13 states have (on average 59.46153846153846) internal successors, (773), 13 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:42,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:42,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-11-19 08:02:42,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:42,847 INFO L124 PetriNetUnfolderBase]: 132/244 cut-off events. [2023-11-19 08:02:42,847 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2023-11-19 08:02:42,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 244 events. 132/244 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 811 event pairs, 23 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 828. Up to 180 conditions per place. [2023-11-19 08:02:42,851 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 41 selfloop transitions, 17 changer transitions 8/66 dead transitions. [2023-11-19 08:02:42,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 459 flow [2023-11-19 08:02:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:02:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 08:02:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 569 transitions. [2023-11-19 08:02:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360153256704981 [2023-11-19 08:02:42,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 569 transitions. [2023-11-19 08:02:42,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 569 transitions. [2023-11-19 08:02:42,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:42,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 569 transitions. [2023-11-19 08:02:42,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.22222222222222) internal successors, (569), 9 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:42,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 145.0) internal successors, (1450), 10 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:42,862 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 145.0) internal successors, (1450), 10 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:42,862 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 198 flow. Second operand 9 states and 569 transitions. [2023-11-19 08:02:42,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 459 flow [2023-11-19 08:02:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 66 transitions, 393 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-11-19 08:02:42,869 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 261 flow [2023-11-19 08:02:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-19 08:02:42,870 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-11-19 08:02:42,870 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 261 flow [2023-11-19 08:02:42,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.46153846153846) internal successors, (773), 13 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:42,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:42,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:42,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:43,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:43,093 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:43,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1333231986, now seen corresponding path program 2 times [2023-11-19 08:02:43,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:43,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035486242] [2023-11-19 08:02:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:43,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:43,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035486242] [2023-11-19 08:02:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035486242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147990224] [2023-11-19 08:02:43,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:43,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:02:43,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:43,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:02:43,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:43,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147990224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:43,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-19 08:02:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884541368] [2023-11-19 08:02:43,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:43,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:02:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:43,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:02:43,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:02:43,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-11-19 08:02:43,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:43,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:43,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-11-19 08:02:43,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:43,969 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2023-11-19 08:02:43,969 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2023-11-19 08:02:43,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 302 events. 164/302 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1106 event pairs, 31 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 1028. Up to 238 conditions per place. [2023-11-19 08:02:43,973 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 51 selfloop transitions, 17 changer transitions 4/72 dead transitions. [2023-11-19 08:02:43,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 72 transitions, 535 flow [2023-11-19 08:02:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:02:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 08:02:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2023-11-19 08:02:43,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2023-11-19 08:02:43,977 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2023-11-19 08:02:43,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2023-11-19 08:02:43,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:43,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2023-11-19 08:02:43,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:43,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:43,983 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:43,983 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 261 flow. Second operand 8 states and 555 transitions. [2023-11-19 08:02:43,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 72 transitions, 535 flow [2023-11-19 08:02:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 485 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-19 08:02:43,990 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 314 flow [2023-11-19 08:02:43,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-19 08:02:43,992 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-11-19 08:02:43,992 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 314 flow [2023-11-19 08:02:43,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:43,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:43,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:44,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:44,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:44,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -712837712, now seen corresponding path program 3 times [2023-11-19 08:02:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889322467] [2023-11-19 08:02:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:44,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889322467] [2023-11-19 08:02:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889322467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140901710] [2023-11-19 08:02:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:02:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:44,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:44,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:44,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:02:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:44,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:02:44,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:44,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:44,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140901710] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:44,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:44,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2023-11-19 08:02:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786041694] [2023-11-19 08:02:44,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:44,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:44,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:02:44,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-11-19 08:02:44,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:44,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:44,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-11-19 08:02:44,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:44,885 INFO L124 PetriNetUnfolderBase]: 180/331 cut-off events. [2023-11-19 08:02:44,885 INFO L125 PetriNetUnfolderBase]: For 551/551 co-relation queries the response was YES. [2023-11-19 08:02:44,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 331 events. 180/331 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1235 event pairs, 48 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 1150. Up to 287 conditions per place. [2023-11-19 08:02:44,889 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 50 selfloop transitions, 12 changer transitions 2/64 dead transitions. [2023-11-19 08:02:44,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 505 flow [2023-11-19 08:02:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:02:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:02:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2023-11-19 08:02:44,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786206896551724 [2023-11-19 08:02:44,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 347 transitions. [2023-11-19 08:02:44,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 347 transitions. [2023-11-19 08:02:44,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:44,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 347 transitions. [2023-11-19 08:02:44,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:44,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:44,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:44,896 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 314 flow. Second operand 5 states and 347 transitions. [2023-11-19 08:02:44,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 505 flow [2023-11-19 08:02:44,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 455 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-19 08:02:44,902 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 339 flow [2023-11-19 08:02:44,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-19 08:02:44,903 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-19 08:02:44,903 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 339 flow [2023-11-19 08:02:44,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:44,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:44,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:44,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:45,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:45,119 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:45,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1673230913, now seen corresponding path program 1 times [2023-11-19 08:02:45,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:45,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177484573] [2023-11-19 08:02:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:45,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:45,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177484573] [2023-11-19 08:02:45,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177484573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:45,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864283000] [2023-11-19 08:02:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:45,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:45,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:45,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:45,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:02:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:45,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:02:45,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:46,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864283000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:46,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:46,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 08:02:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706901386] [2023-11-19 08:02:46,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:02:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:02:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:02:47,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:02:47,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 339 flow. Second operand has 18 states, 18 states have (on average 57.94444444444444) internal successors, (1043), 18 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:47,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:47,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:02:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:48,701 INFO L124 PetriNetUnfolderBase]: 267/509 cut-off events. [2023-11-19 08:02:48,701 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2023-11-19 08:02:48,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 509 events. 267/509 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2330 event pairs, 23 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 1752. Up to 216 conditions per place. [2023-11-19 08:02:48,706 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 86 selfloop transitions, 52 changer transitions 35/173 dead transitions. [2023-11-19 08:02:48,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 173 transitions, 1166 flow [2023-11-19 08:02:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:02:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 08:02:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1486 transitions. [2023-11-19 08:02:48,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42701149425287355 [2023-11-19 08:02:48,718 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1486 transitions. [2023-11-19 08:02:48,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1486 transitions. [2023-11-19 08:02:48,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:48,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1486 transitions. [2023-11-19 08:02:48,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:48,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:48,735 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:48,735 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 339 flow. Second operand 24 states and 1486 transitions. [2023-11-19 08:02:48,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 173 transitions, 1166 flow [2023-11-19 08:02:48,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 173 transitions, 1143 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:48,748 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 636 flow [2023-11-19 08:02:48,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=636, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2023-11-19 08:02:48,752 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-11-19 08:02:48,752 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 636 flow [2023-11-19 08:02:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.94444444444444) internal successors, (1043), 18 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:48,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:02:48,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:48,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1859845675, now seen corresponding path program 2 times [2023-11-19 08:02:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774644716] [2023-11-19 08:02:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:49,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774644716] [2023-11-19 08:02:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774644716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912213882] [2023-11-19 08:02:49,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:49,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:49,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:49,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:02:49,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:49,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:02:49,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:50,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:50,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912213882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:50,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-19 08:02:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293816379] [2023-11-19 08:02:50,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:02:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:02:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:02:51,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:02:51,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 636 flow. Second operand has 19 states, 19 states have (on average 57.8421052631579) internal successors, (1099), 19 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:51,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:51,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:02:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:53,085 INFO L124 PetriNetUnfolderBase]: 307/616 cut-off events. [2023-11-19 08:02:53,086 INFO L125 PetriNetUnfolderBase]: For 3143/3143 co-relation queries the response was YES. [2023-11-19 08:02:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 616 events. 307/616 cut-off events. For 3143/3143 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3140 event pairs, 19 based on Foata normal form. 3/615 useless extension candidates. Maximal degree in co-relation 2797. Up to 231 conditions per place. [2023-11-19 08:02:53,094 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 100 selfloop transitions, 81 changer transitions 22/203 dead transitions. [2023-11-19 08:02:53,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 203 transitions, 1834 flow [2023-11-19 08:02:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 08:02:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 08:02:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1846 transitions. [2023-11-19 08:02:53,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424367816091954 [2023-11-19 08:02:53,104 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1846 transitions. [2023-11-19 08:02:53,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1846 transitions. [2023-11-19 08:02:53,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:53,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1846 transitions. [2023-11-19 08:02:53,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 61.53333333333333) internal successors, (1846), 30 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:53,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:53,123 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:53,123 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 636 flow. Second operand 30 states and 1846 transitions. [2023-11-19 08:02:53,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 203 transitions, 1834 flow [2023-11-19 08:02:53,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 203 transitions, 1601 flow, removed 96 selfloop flow, removed 12 redundant places. [2023-11-19 08:02:53,161 INFO L231 Difference]: Finished difference. Result has 107 places, 114 transitions, 1080 flow [2023-11-19 08:02:53,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1080, PETRI_PLACES=107, PETRI_TRANSITIONS=114} [2023-11-19 08:02:53,162 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-19 08:02:53,162 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 114 transitions, 1080 flow [2023-11-19 08:02:53,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.8421052631579) internal successors, (1099), 19 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:53,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:53,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:53,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:02:53,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:53,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1887551305, now seen corresponding path program 3 times [2023-11-19 08:02:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295830207] [2023-11-19 08:02:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:54,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295830207] [2023-11-19 08:02:54,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295830207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476558362] [2023-11-19 08:02:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:02:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:54,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:02:54,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:02:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:54,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:02:54,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:54,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:54,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476558362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:54,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:54,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-19 08:02:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366795900] [2023-11-19 08:02:54,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:02:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:02:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:02:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:02:55,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 114 transitions, 1080 flow. Second operand has 19 states, 19 states have (on average 57.8421052631579) internal successors, (1099), 19 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:55,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:55,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:02:55,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:56,938 INFO L124 PetriNetUnfolderBase]: 294/579 cut-off events. [2023-11-19 08:02:56,938 INFO L125 PetriNetUnfolderBase]: For 2516/2516 co-relation queries the response was YES. [2023-11-19 08:02:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 579 events. 294/579 cut-off events. For 2516/2516 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2836 event pairs, 19 based on Foata normal form. 3/576 useless extension candidates. Maximal degree in co-relation 2737. Up to 235 conditions per place. [2023-11-19 08:02:56,946 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 86 selfloop transitions, 82 changer transitions 17/185 dead transitions. [2023-11-19 08:02:56,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 185 transitions, 1730 flow [2023-11-19 08:02:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 08:02:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 08:02:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1539 transitions. [2023-11-19 08:02:56,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424551724137931 [2023-11-19 08:02:56,955 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1539 transitions. [2023-11-19 08:02:56,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1539 transitions. [2023-11-19 08:02:56,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:56,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1539 transitions. [2023-11-19 08:02:56,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 61.56) internal successors, (1539), 25 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 145.0) internal successors, (3770), 26 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,973 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 145.0) internal successors, (3770), 26 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,973 INFO L175 Difference]: Start difference. First operand has 107 places, 114 transitions, 1080 flow. Second operand 25 states and 1539 transitions. [2023-11-19 08:02:56,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 185 transitions, 1730 flow [2023-11-19 08:02:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1356 flow, removed 161 selfloop flow, removed 14 redundant places. [2023-11-19 08:02:57,000 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 975 flow [2023-11-19 08:02:57,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=975, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2023-11-19 08:02:57,001 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2023-11-19 08:02:57,001 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 975 flow [2023-11-19 08:02:57,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.8421052631579) internal successors, (1099), 19 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:57,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:57,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:57,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:02:57,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:02:57,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 607274760, now seen corresponding path program 4 times [2023-11-19 08:02:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:57,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735312154] [2023-11-19 08:02:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:57,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735312154] [2023-11-19 08:02:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735312154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282018402] [2023-11-19 08:02:57,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:02:57,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:57,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:57,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:02:58,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:02:58,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:58,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 08:02:58,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:58,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:59,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282018402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:59,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:59,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-19 08:02:59,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445861959] [2023-11-19 08:02:59,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:59,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 08:02:59,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 08:02:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-19 08:03:00,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:03:00,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 975 flow. Second operand has 21 states, 21 states have (on average 57.857142857142854) internal successors, (1215), 21 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:00,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:00,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:03:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:03,277 INFO L124 PetriNetUnfolderBase]: 358/695 cut-off events. [2023-11-19 08:03:03,278 INFO L125 PetriNetUnfolderBase]: For 2244/2244 co-relation queries the response was YES. [2023-11-19 08:03:03,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 695 events. 358/695 cut-off events. For 2244/2244 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3540 event pairs, 13 based on Foata normal form. 5/692 useless extension candidates. Maximal degree in co-relation 3153. Up to 294 conditions per place. [2023-11-19 08:03:03,287 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 124 selfloop transitions, 83 changer transitions 31/238 dead transitions. [2023-11-19 08:03:03,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 238 transitions, 2097 flow [2023-11-19 08:03:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 08:03:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-19 08:03:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2024 transitions. [2023-11-19 08:03:03,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42298850574712643 [2023-11-19 08:03:03,296 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2024 transitions. [2023-11-19 08:03:03,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2024 transitions. [2023-11-19 08:03:03,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:03,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2024 transitions. [2023-11-19 08:03:03,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 61.333333333333336) internal successors, (2024), 33 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:03,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:03,313 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:03,313 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 975 flow. Second operand 33 states and 2024 transitions. [2023-11-19 08:03:03,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 238 transitions, 2097 flow [2023-11-19 08:03:03,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 238 transitions, 1895 flow, removed 36 selfloop flow, removed 20 redundant places. [2023-11-19 08:03:03,335 INFO L231 Difference]: Finished difference. Result has 135 places, 141 transitions, 1283 flow [2023-11-19 08:03:03,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1283, PETRI_PLACES=135, PETRI_TRANSITIONS=141} [2023-11-19 08:03:03,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2023-11-19 08:03:03,337 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 141 transitions, 1283 flow [2023-11-19 08:03:03,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.857142857142854) internal successors, (1215), 21 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:03,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:03,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:03,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:03,544 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:03:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1461655849, now seen corresponding path program 5 times [2023-11-19 08:03:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653509872] [2023-11-19 08:03:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653509872] [2023-11-19 08:03:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653509872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448780558] [2023-11-19 08:03:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:03:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:04,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:03:04,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:03:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:04,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:03:04,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:04,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448780558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:05,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 08:03:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272685381] [2023-11-19 08:03:05,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:05,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:03:05,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:03:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:03:05,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:03:05,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 141 transitions, 1283 flow. Second operand has 18 states, 18 states have (on average 58.0) internal successors, (1044), 18 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:05,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:05,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:03:05,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:06,673 INFO L124 PetriNetUnfolderBase]: 388/753 cut-off events. [2023-11-19 08:03:06,673 INFO L125 PetriNetUnfolderBase]: For 3085/3085 co-relation queries the response was YES. [2023-11-19 08:03:06,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3748 conditions, 753 events. 388/753 cut-off events. For 3085/3085 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3890 event pairs, 53 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 3701. Up to 618 conditions per place. [2023-11-19 08:03:06,685 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 156 selfloop transitions, 37 changer transitions 16/209 dead transitions. [2023-11-19 08:03:06,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 209 transitions, 2131 flow [2023-11-19 08:03:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:03:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:03:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 988 transitions. [2023-11-19 08:03:06,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42586206896551726 [2023-11-19 08:03:06,690 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 988 transitions. [2023-11-19 08:03:06,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 988 transitions. [2023-11-19 08:03:06,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:06,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 988 transitions. [2023-11-19 08:03:06,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:06,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:06,699 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:06,699 INFO L175 Difference]: Start difference. First operand has 135 places, 141 transitions, 1283 flow. Second operand 16 states and 988 transitions. [2023-11-19 08:03:06,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 209 transitions, 2131 flow [2023-11-19 08:03:06,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 209 transitions, 1844 flow, removed 113 selfloop flow, removed 15 redundant places. [2023-11-19 08:03:06,732 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1413 flow [2023-11-19 08:03:06,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1413, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2023-11-19 08:03:06,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-19 08:03:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1413 flow [2023-11-19 08:03:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.0) internal successors, (1044), 18 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:06,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:06,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:06,947 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:03:06,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash 977103335, now seen corresponding path program 6 times [2023-11-19 08:03:06,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:06,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261573557] [2023-11-19 08:03:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:06,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:07,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:07,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261573557] [2023-11-19 08:03:07,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261573557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797253666] [2023-11-19 08:03:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:03:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:07,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:07,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:03:07,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 08:03:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:07,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:03:07,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:07,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797253666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:09,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 08:03:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825185139] [2023-11-19 08:03:09,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:09,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:03:09,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:03:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:03:09,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:03:09,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1413 flow. Second operand has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:09,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:09,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:03:09,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:10,799 INFO L124 PetriNetUnfolderBase]: 438/859 cut-off events. [2023-11-19 08:03:10,799 INFO L125 PetriNetUnfolderBase]: For 4031/4031 co-relation queries the response was YES. [2023-11-19 08:03:10,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 859 events. 438/859 cut-off events. For 4031/4031 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4671 event pairs, 52 based on Foata normal form. 2/845 useless extension candidates. Maximal degree in co-relation 4260. Up to 680 conditions per place. [2023-11-19 08:03:10,810 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 180 selfloop transitions, 57 changer transitions 10/247 dead transitions. [2023-11-19 08:03:10,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 247 transitions, 2540 flow [2023-11-19 08:03:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 08:03:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 08:03:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1404 transitions. [2023-11-19 08:03:10,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209895052473763 [2023-11-19 08:03:10,814 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1404 transitions. [2023-11-19 08:03:10,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1404 transitions. [2023-11-19 08:03:10,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:10,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1404 transitions. [2023-11-19 08:03:10,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.04347826086956) internal successors, (1404), 23 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,827 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,828 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1413 flow. Second operand 23 states and 1404 transitions. [2023-11-19 08:03:10,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 247 transitions, 2540 flow [2023-11-19 08:03:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 2435 flow, removed 47 selfloop flow, removed 3 redundant places. [2023-11-19 08:03:10,871 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 1902 flow [2023-11-19 08:03:10,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1902, PETRI_PLACES=168, PETRI_TRANSITIONS=191} [2023-11-19 08:03:10,872 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-19 08:03:10,872 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 1902 flow [2023-11-19 08:03:10,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:10,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:10,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:10,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:11,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:03:11,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:03:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash 904913015, now seen corresponding path program 7 times [2023-11-19 08:03:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230993741] [2023-11-19 08:03:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:11,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:11,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230993741] [2023-11-19 08:03:11,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230993741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:11,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363443705] [2023-11-19 08:03:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:03:11,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:11,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:11,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:03:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:11,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:03:11,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:11,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:13,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363443705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:13,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:13,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 08:03:13,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007118328] [2023-11-19 08:03:13,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:13,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:03:13,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:03:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:03:13,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-11-19 08:03:13,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 1902 flow. Second operand has 18 states, 18 states have (on average 58.0) internal successors, (1044), 18 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:13,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:13,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-11-19 08:03:13,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:14,819 INFO L124 PetriNetUnfolderBase]: 432/831 cut-off events. [2023-11-19 08:03:14,819 INFO L125 PetriNetUnfolderBase]: For 4246/4246 co-relation queries the response was YES. [2023-11-19 08:03:14,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4403 conditions, 831 events. 432/831 cut-off events. For 4246/4246 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4397 event pairs, 54 based on Foata normal form. 2/815 useless extension candidates. Maximal degree in co-relation 4303. Up to 680 conditions per place. [2023-11-19 08:03:14,832 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 166 selfloop transitions, 57 changer transitions 10/233 dead transitions. [2023-11-19 08:03:14,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 233 transitions, 2543 flow [2023-11-19 08:03:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:03:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 08:03:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1272 transitions. [2023-11-19 08:03:14,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41773399014778323 [2023-11-19 08:03:14,836 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1272 transitions. [2023-11-19 08:03:14,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1272 transitions. [2023-11-19 08:03:14,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:14,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1272 transitions. [2023-11-19 08:03:14,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.57142857142857) internal successors, (1272), 21 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,846 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,846 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 1902 flow. Second operand 21 states and 1272 transitions. [2023-11-19 08:03:14,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 233 transitions, 2543 flow [2023-11-19 08:03:14,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 233 transitions, 2244 flow, removed 121 selfloop flow, removed 12 redundant places. [2023-11-19 08:03:14,900 INFO L231 Difference]: Finished difference. Result has 178 places, 193 transitions, 1815 flow [2023-11-19 08:03:14,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1815, PETRI_PLACES=178, PETRI_TRANSITIONS=193} [2023-11-19 08:03:14,903 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2023-11-19 08:03:14,903 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 193 transitions, 1815 flow [2023-11-19 08:03:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.0) internal successors, (1044), 18 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:14,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:14,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:14,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:15,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:03:15,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:03:15,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1077348435, now seen corresponding path program 4 times [2023-11-19 08:03:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811800085] [2023-11-19 08:03:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:15,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:15,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811800085] [2023-11-19 08:03:15,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811800085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:15,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716279970] [2023-11-19 08:03:15,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:03:15,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:15,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:15,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f37843-535c-498c-8d6f-d1b176725647/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:03:15,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:03:15,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:15,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:03:15,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:15,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:17,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716279970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:17,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:17,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-11-19 08:03:17,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986478693] [2023-11-19 08:03:17,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:03:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:03:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2023-11-19 08:03:20,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1]