./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/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 1ac00c9540bbc99a446c9cb6c02e180c3a0ad4fef3c182d14bafdc7ea871c54c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:28,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:28,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:04:28,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:28,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:28,196 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:28,196 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:28,197 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:28,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:28,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:28,200 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:28,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:28,201 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:28,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:28,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:04:28,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:28,203 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:28,204 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:28,204 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:28,205 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:04:28,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:28,206 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:04:28,206 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:28,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:04:28,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:28,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:28,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:28,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:28,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:28,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:28,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:28,210 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:04:28,211 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:28,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:28,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:28,212 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:04:28,213 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:28,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:28,213 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:28,214 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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ac00c9540bbc99a446c9cb6c02e180c3a0ad4fef3c182d14bafdc7ea871c54c [2023-11-19 08:04:28,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:28,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:28,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:28,530 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:28,530 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:28,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-19 08:04:31,677 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:31,971 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:31,972 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2023-11-19 08:04:31,983 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/data/f38887bf3/e5acfc4ad81d46adbcd845f9c11a2be8/FLAGd0098e65a [2023-11-19 08:04:32,000 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/data/f38887bf3/e5acfc4ad81d46adbcd845f9c11a2be8 [2023-11-19 08:04:32,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:32,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:32,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:32,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:32,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:32,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3922110c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32, skipping insertion in model container [2023-11-19 08:04:32,019 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:32,268 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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2895,2908] [2023-11-19 08:04:32,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:32,283 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:32,307 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_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2895,2908] [2023-11-19 08:04:32,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:32,316 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:04:32,316 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:04:32,324 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:32,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32 WrapperNode [2023-11-19 08:04:32,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:32,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:32,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:32,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:32,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,364 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-11-19 08:04:32,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:32,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:32,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:32,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:32,377 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:32,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:32,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:32,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:32,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (1/1) ... [2023-11-19 08:04:32,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:32,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:32,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:04:32,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:04:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:04:32,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:04:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:04:32,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:04:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:04:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:04:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:04:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:04:32,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:32,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:32,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:04:32,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:04:32,489 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 08:04:32,603 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:32,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:32,865 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:32,893 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:32,894 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:04:32,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:32 BoogieIcfgContainer [2023-11-19 08:04:32,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:32,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:32,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:32,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:32,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:32" (1/3) ... [2023-11-19 08:04:32,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2555b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:32, skipping insertion in model container [2023-11-19 08:04:32,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:32" (2/3) ... [2023-11-19 08:04:32,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2555b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:32, skipping insertion in model container [2023-11-19 08:04:32,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:32" (3/3) ... [2023-11-19 08:04:32,909 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-11-19 08:04:32,922 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:04:32,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:32,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:32,936 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:04:33,069 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:04:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 131 transitions, 283 flow [2023-11-19 08:04:33,191 INFO L124 PetriNetUnfolderBase]: 16/128 cut-off events. [2023-11-19 08:04:33,192 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:33,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 128 events. 16/128 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 169 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2023-11-19 08:04:33,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 131 transitions, 283 flow [2023-11-19 08:04:33,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 117 transitions, 252 flow [2023-11-19 08:04:33,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:04:33,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 117 transitions, 252 flow [2023-11-19 08:04:33,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 117 transitions, 252 flow [2023-11-19 08:04:33,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 117 transitions, 252 flow [2023-11-19 08:04:33,349 INFO L124 PetriNetUnfolderBase]: 16/117 cut-off events. [2023-11-19 08:04:33,350 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:33,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 16/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2023-11-19 08:04:33,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 3534 [2023-11-19 08:04:38,194 INFO L134 LiptonReduction]: Checked pairs total: 3647 [2023-11-19 08:04:38,194 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-19 08:04:38,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:38,218 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;@b2cceb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:38,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:04:38,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:38,225 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-19 08:04:38,225 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:38,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:38,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:38,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:38,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash 351173292, now seen corresponding path program 1 times [2023-11-19 08:04:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:38,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595549491] [2023-11-19 08:04:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:38,680 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 08:04:38,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595549491] [2023-11-19 08:04:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595549491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:38,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:38,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:04:38,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121483257] [2023-11-19 08:04:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:38,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:38,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 247 [2023-11-19 08:04:38,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 08:04:38,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:38,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 247 [2023-11-19 08:04:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:38,968 INFO L124 PetriNetUnfolderBase]: 359/506 cut-off events. [2023-11-19 08:04:38,969 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-19 08:04:38,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1614 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-11-19 08:04:38,981 INFO L140 encePairwiseOnDemand]: 242/247 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-11-19 08:04:38,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-11-19 08:04:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-11-19 08:04:39,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060728744939271 [2023-11-19 08:04:39,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-11-19 08:04:39,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-11-19 08:04:39,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:39,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-11-19 08:04:39,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 08:04:39,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,036 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 375 transitions. [2023-11-19 08:04:39,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-11-19 08:04:39,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 08:04:39,044 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-11-19 08:04:39,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-19 08:04:39,052 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-19 08:04:39,052 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-11-19 08:04:39,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 08:04:39,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:39,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:39,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:39,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash 729732734, now seen corresponding path program 1 times [2023-11-19 08:04:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355191106] [2023-11-19 08:04:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,324 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 08:04:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:39,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355191106] [2023-11-19 08:04:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355191106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:39,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:39,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382474603] [2023-11-19 08:04:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:39,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:39,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 247 [2023-11-19 08:04:39,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 08:04:39,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 247 [2023-11-19 08:04:39,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:39,472 INFO L124 PetriNetUnfolderBase]: 285/411 cut-off events. [2023-11-19 08:04:39,473 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-19 08:04:39,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 411 events. 285/411 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1261 event pairs, 44 based on Foata normal form. 40/443 useless extension candidates. Maximal degree in co-relation 353. Up to 287 conditions per place. [2023-11-19 08:04:39,477 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 29 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-19 08:04:39,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 35 transitions, 168 flow [2023-11-19 08:04:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-19 08:04:39,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020242914979757 [2023-11-19 08:04:39,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:39,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 08:04:39,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,492 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 3 states and 372 transitions. [2023-11-19 08:04:39,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 35 transitions, 168 flow [2023-11-19 08:04:39,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:39,495 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 87 flow [2023-11-19 08:04:39,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-11-19 08:04:39,502 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-19 08:04:39,503 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 87 flow [2023-11-19 08:04:39,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 08:04:39,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:39,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:39,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:39,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash 290231299, now seen corresponding path program 1 times [2023-11-19 08:04:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182362114] [2023-11-19 08:04:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,613 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 08:04:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182362114] [2023-11-19 08:04:39,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182362114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:39,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:39,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:39,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018751188] [2023-11-19 08:04:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:39,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 247 [2023-11-19 08:04:39,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 08:04:39,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 247 [2023-11-19 08:04:39,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:39,745 INFO L124 PetriNetUnfolderBase]: 244/354 cut-off events. [2023-11-19 08:04:39,745 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-11-19 08:04:39,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 354 events. 244/354 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1036 event pairs, 63 based on Foata normal form. 27/375 useless extension candidates. Maximal degree in co-relation 234. Up to 286 conditions per place. [2023-11-19 08:04:39,749 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 31 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-19 08:04:39,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 194 flow [2023-11-19 08:04:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-19 08:04:39,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020242914979757 [2023-11-19 08:04:39,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:39,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-19 08:04:39,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 08:04:39,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:39,757 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 87 flow. Second operand 3 states and 372 transitions. [2023-11-19 08:04:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 194 flow [2023-11-19 08:04:39,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 37 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:39,761 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 101 flow [2023-11-19 08:04:39,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-19 08:04:39,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 08:04:39,766 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 101 flow [2023-11-19 08:04:39,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 08:04:39,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:39,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:04:39,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:39,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1419237293, now seen corresponding path program 1 times [2023-11-19 08:04:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019781065] [2023-11-19 08:04:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:39,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019781065] [2023-11-19 08:04:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019781065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:39,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:39,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810006074] [2023-11-19 08:04:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:39,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 247 [2023-11-19 08:04:39,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 08:04:39,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 247 [2023-11-19 08:04:39,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:40,036 INFO L124 PetriNetUnfolderBase]: 220/334 cut-off events. [2023-11-19 08:04:40,036 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-19 08:04:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 334 events. 220/334 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 990 event pairs, 40 based on Foata normal form. 17/341 useless extension candidates. Maximal degree in co-relation 717. Up to 199 conditions per place. [2023-11-19 08:04:40,040 INFO L140 encePairwiseOnDemand]: 244/247 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-19 08:04:40,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 222 flow [2023-11-19 08:04:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-19 08:04:40,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020242914979757 [2023-11-19 08:04:40,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-19 08:04:40,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-19 08:04:40,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:40,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-19 08:04:40,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 08:04:40,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:40,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 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 08:04:40,049 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 101 flow. Second operand 3 states and 372 transitions. [2023-11-19 08:04:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 222 flow [2023-11-19 08:04:40,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:40,053 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 115 flow [2023-11-19 08:04:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-19 08:04:40,055 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-19 08:04:40,055 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 115 flow [2023-11-19 08:04:40,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 08:04:40,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:40,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:40,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:04:40,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash -897449352, now seen corresponding path program 1 times [2023-11-19 08:04:40,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:40,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717902343] [2023-11-19 08:04:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:40,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717902343] [2023-11-19 08:04:40,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717902343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691627265] [2023-11-19 08:04:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:40,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:40,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:40,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:04:40,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:40,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:41,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691627265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:41,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:41,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 08:04:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274696131] [2023-11-19 08:04:41,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:04:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:04:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:41,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 247 [2023-11-19 08:04:41,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 115 flow. Second operand has 8 states, 8 states have (on average 103.625) internal successors, (829), 8 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 08:04:41,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:41,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 247 [2023-11-19 08:04:41,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:41,584 INFO L124 PetriNetUnfolderBase]: 367/542 cut-off events. [2023-11-19 08:04:41,584 INFO L125 PetriNetUnfolderBase]: For 492/492 co-relation queries the response was YES. [2023-11-19 08:04:41,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1853 conditions, 542 events. 367/542 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1721 event pairs, 10 based on Foata normal form. 72/610 useless extension candidates. Maximal degree in co-relation 696. Up to 301 conditions per place. [2023-11-19 08:04:41,591 INFO L140 encePairwiseOnDemand]: 242/247 looper letters, 102 selfloop transitions, 20 changer transitions 0/125 dead transitions. [2023-11-19 08:04:41,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 125 transitions, 755 flow [2023-11-19 08:04:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:04:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 08:04:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1376 transitions. [2023-11-19 08:04:41,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42852693864839614 [2023-11-19 08:04:41,598 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1376 transitions. [2023-11-19 08:04:41,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1376 transitions. [2023-11-19 08:04:41,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:41,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1376 transitions. [2023-11-19 08:04:41,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states 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 08:04:41,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 08:04:41,614 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 247.0) internal successors, (3458), 14 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states 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 08:04:41,614 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 115 flow. Second operand 13 states and 1376 transitions. [2023-11-19 08:04:41,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 125 transitions, 755 flow [2023-11-19 08:04:41,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 125 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:41,620 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 276 flow [2023-11-19 08:04:41,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=276, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 08:04:41,621 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-11-19 08:04:41,621 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 276 flow [2023-11-19 08:04:41,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.625) internal successors, (829), 8 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 08:04:41,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:41,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:41,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:41,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:41,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:41,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1317136288, now seen corresponding path program 2 times [2023-11-19 08:04:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434527085] [2023-11-19 08:04:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:04:42,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434527085] [2023-11-19 08:04:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434527085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:42,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209514690] [2023-11-19 08:04:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:42,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:42,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:42,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:42,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:04:42,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:04:42,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209514690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:42,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-11-19 08:04:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514924938] [2023-11-19 08:04:42,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:04:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:04:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:42,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 247 [2023-11-19 08:04:42,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 276 flow. Second operand has 8 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:04:42,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:42,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 247 [2023-11-19 08:04:42,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:43,343 INFO L124 PetriNetUnfolderBase]: 465/679 cut-off events. [2023-11-19 08:04:43,343 INFO L125 PetriNetUnfolderBase]: For 2000/2000 co-relation queries the response was YES. [2023-11-19 08:04:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 679 events. 465/679 cut-off events. For 2000/2000 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2191 event pairs, 0 based on Foata normal form. 42/720 useless extension candidates. Maximal degree in co-relation 2427. Up to 397 conditions per place. [2023-11-19 08:04:43,353 INFO L140 encePairwiseOnDemand]: 242/247 looper letters, 123 selfloop transitions, 41 changer transitions 0/167 dead transitions. [2023-11-19 08:04:43,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 167 transitions, 1468 flow [2023-11-19 08:04:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:04:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 08:04:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1756 transitions. [2023-11-19 08:04:43,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41819480828768757 [2023-11-19 08:04:43,362 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1756 transitions. [2023-11-19 08:04:43,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1756 transitions. [2023-11-19 08:04:43,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:43,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1756 transitions. [2023-11-19 08:04:43,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.29411764705883) internal successors, (1756), 17 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 08:04:43,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 247.0) internal successors, (4446), 18 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states 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 08:04:43,379 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 247.0) internal successors, (4446), 18 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states 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 08:04:43,379 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 276 flow. Second operand 17 states and 1756 transitions. [2023-11-19 08:04:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 167 transitions, 1468 flow [2023-11-19 08:04:43,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 167 transitions, 1326 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:43,398 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 555 flow [2023-11-19 08:04:43,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=555, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-11-19 08:04:43,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-11-19 08:04:43,400 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 555 flow [2023-11-19 08:04:43,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:04:43,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:43,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:43,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:04:43,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:43,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1535108940, now seen corresponding path program 3 times [2023-11-19 08:04:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990255938] [2023-11-19 08:04:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:43,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:45,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:45,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990255938] [2023-11-19 08:04:45,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990255938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:45,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399847301] [2023-11-19 08:04:45,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:04:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:45,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:45,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:45,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:45,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:04:45,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:45,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:04:45,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:46,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399847301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:47,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-11-19 08:04:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020399738] [2023-11-19 08:04:47,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 08:04:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 08:04:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2023-11-19 08:04:47,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-11-19 08:04:47,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 555 flow. Second operand has 29 states, 29 states have (on average 79.13793103448276) internal successors, (2295), 29 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 08:04:47,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:47,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-11-19 08:04:47,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:53,431 INFO L124 PetriNetUnfolderBase]: 4240/6308 cut-off events. [2023-11-19 08:04:53,431 INFO L125 PetriNetUnfolderBase]: For 34349/34349 co-relation queries the response was YES. [2023-11-19 08:04:53,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 6308 events. 4240/6308 cut-off events. For 34349/34349 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33372 event pairs, 0 based on Foata normal form. 54/6361 useless extension candidates. Maximal degree in co-relation 20002. Up to 3249 conditions per place. [2023-11-19 08:04:53,520 INFO L140 encePairwiseOnDemand]: 239/247 looper letters, 377 selfloop transitions, 548 changer transitions 80/1008 dead transitions. [2023-11-19 08:04:53,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1008 transitions, 8751 flow [2023-11-19 08:04:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-19 08:04:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-19 08:04:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5807 transitions. [2023-11-19 08:04:53,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508973351864161 [2023-11-19 08:04:53,548 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5807 transitions. [2023-11-19 08:04:53,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5807 transitions. [2023-11-19 08:04:53,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:53,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5807 transitions. [2023-11-19 08:04:53,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 86.67164179104478) internal successors, (5807), 67 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states 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 08:04:53,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 247.0) internal successors, (16796), 68 states have internal predecessors, (16796), 0 states have call successors, (0), 0 states 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 08:04:53,609 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 247.0) internal successors, (16796), 68 states have internal predecessors, (16796), 0 states have call successors, (0), 0 states 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 08:04:53,609 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 555 flow. Second operand 67 states and 5807 transitions. [2023-11-19 08:04:53,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 1008 transitions, 8751 flow [2023-11-19 08:04:53,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 1008 transitions, 8502 flow, removed 99 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:53,800 INFO L231 Difference]: Finished difference. Result has 141 places, 642 transitions, 6877 flow [2023-11-19 08:04:53,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=6877, PETRI_PLACES=141, PETRI_TRANSITIONS=642} [2023-11-19 08:04:53,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2023-11-19 08:04:53,801 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 642 transitions, 6877 flow [2023-11-19 08:04:53,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 79.13793103448276) internal successors, (2295), 29 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 08:04:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:53,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:53,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:04:54,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:54,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1364375128, now seen corresponding path program 4 times [2023-11-19 08:04:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:54,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505381710] [2023-11-19 08:04:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:54,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:55,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505381710] [2023-11-19 08:04:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505381710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224442978] [2023-11-19 08:04:55,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:04:55,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:55,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:55,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:55,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:04:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:55,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:04:55,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:56,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224442978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:57,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:57,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-19 08:04:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842108129] [2023-11-19 08:04:57,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:57,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 08:04:57,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 08:04:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2023-11-19 08:04:57,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-11-19 08:04:57,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 642 transitions, 6877 flow. Second operand has 28 states, 28 states have (on average 78.92857142857143) internal successors, (2210), 28 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 08:04:57,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:57,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-11-19 08:04:57,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:06,001 INFO L124 PetriNetUnfolderBase]: 11318/17050 cut-off events. [2023-11-19 08:05:06,001 INFO L125 PetriNetUnfolderBase]: For 105651/105651 co-relation queries the response was YES. [2023-11-19 08:05:06,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99274 conditions, 17050 events. 11318/17050 cut-off events. For 105651/105651 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 108470 event pairs, 16 based on Foata normal form. 45/17094 useless extension candidates. Maximal degree in co-relation 98536. Up to 8533 conditions per place. [2023-11-19 08:05:06,242 INFO L140 encePairwiseOnDemand]: 239/247 looper letters, 701 selfloop transitions, 1702 changer transitions 46/2452 dead transitions. [2023-11-19 08:05:06,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 2452 transitions, 29110 flow [2023-11-19 08:05:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-19 08:05:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-19 08:05:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5726 transitions. [2023-11-19 08:05:06,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35124524598208806 [2023-11-19 08:05:06,256 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5726 transitions. [2023-11-19 08:05:06,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5726 transitions. [2023-11-19 08:05:06,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:06,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5726 transitions. [2023-11-19 08:05:06,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 86.75757575757575) internal successors, (5726), 66 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states 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 08:05:06,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 247.0) internal successors, (16549), 67 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states 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 08:05:06,315 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 247.0) internal successors, (16549), 67 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states 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 08:05:06,323 INFO L175 Difference]: Start difference. First operand has 141 places, 642 transitions, 6877 flow. Second operand 66 states and 5726 transitions. [2023-11-19 08:05:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 2452 transitions, 29110 flow [2023-11-19 08:05:09,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 2452 transitions, 21902 flow, removed 3596 selfloop flow, removed 5 redundant places. [2023-11-19 08:05:09,887 INFO L231 Difference]: Finished difference. Result has 227 places, 2029 transitions, 22046 flow [2023-11-19 08:05:09,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=22046, PETRI_PLACES=227, PETRI_TRANSITIONS=2029} [2023-11-19 08:05:09,889 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 198 predicate places. [2023-11-19 08:05:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 2029 transitions, 22046 flow [2023-11-19 08:05:09,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 78.92857142857143) internal successors, (2210), 28 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 08:05:09,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:09,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:09,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:10,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:05:10,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:10,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1505062316, now seen corresponding path program 5 times [2023-11-19 08:05:10,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:10,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670302238] [2023-11-19 08:05:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:11,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670302238] [2023-11-19 08:05:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670302238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950969334] [2023-11-19 08:05:11,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:05:11,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:11,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:11,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:11,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_218e0076-c1ee-4aa0-ae2f-2c5ab9077b79/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:05:11,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 08:05:11,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:11,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 08:05:11,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:12,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:13,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950969334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:13,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:13,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-19 08:05:13,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931453146] [2023-11-19 08:05:13,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 08:05:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 08:05:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2023-11-19 08:05:13,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 247 [2023-11-19 08:05:13,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 2029 transitions, 22046 flow. Second operand has 28 states, 28 states have (on average 79.07142857142857) internal successors, (2214), 28 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states 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 08:05:13,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:13,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 247 [2023-11-19 08:05:13,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand