./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.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_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/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_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/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_021f23a9-b64d-4e8b-a925-58d5deeb0045/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 47fde0ba5912e0415b0c299af0f3ae7b3e6a5b956bf726bb77299079d74126b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:53,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:53,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:53,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:53,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:53,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:53,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:53,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:53,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:53,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:53,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:53,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:53,386 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:53,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:53,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:53,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:53,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:53,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:53,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:53,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:53,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:53,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:53,392 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:53,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:53,393 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:53,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:53,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:53,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:53,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:53,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:53,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:53,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:53,397 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:53,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:53,398 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:53,398 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:53,398 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:53,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:53,399 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:53,399 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_021f23a9-b64d-4e8b-a925-58d5deeb0045/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47fde0ba5912e0415b0c299af0f3ae7b3e6a5b956bf726bb77299079d74126b4 [2023-11-19 08:05:53,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:53,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:53,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:53,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:53,783 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:53,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2023-11-19 08:05:56,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:57,157 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:57,158 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2023-11-19 08:05:57,168 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/data/cc31421dc/1f83363a8e1345a794663dde248caa11/FLAG21ac3c473 [2023-11-19 08:05:57,183 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/data/cc31421dc/1f83363a8e1345a794663dde248caa11 [2023-11-19 08:05:57,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:57,188 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:57,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:57,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:57,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:57,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335160c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57, skipping insertion in model container [2023-11-19 08:05:57,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,243 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:57,466 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_021f23a9-b64d-4e8b-a925-58d5deeb0045/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3336,3349] [2023-11-19 08:05:57,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:57,487 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:57,519 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_021f23a9-b64d-4e8b-a925-58d5deeb0045/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3336,3349] [2023-11-19 08:05:57,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:57,533 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:57,534 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:57,542 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:57,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57 WrapperNode [2023-11-19 08:05:57,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:57,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:57,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:57,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:57,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,624 INFO L138 Inliner]: procedures = 27, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 180 [2023-11-19 08:05:57,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:57,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:57,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:57,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:57,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:57,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:57,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:57,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:57,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (1/1) ... [2023-11-19 08:05:57,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:57,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:57,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:05:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:05:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:05:57,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:05:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:05:57,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:05:57,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:05:57,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:05:57,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 08:05:57,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 08:05:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-19 08:05:57,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-19 08:05:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:05:57,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:05:57,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:05:57,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:57,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:57,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:57,850 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 08:05:57,980 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:57,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:58,459 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:58,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:58,566 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 08:05:58,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:58 BoogieIcfgContainer [2023-11-19 08:05:58,571 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:58,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:58,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:58,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:58,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:57" (1/3) ... [2023-11-19 08:05:58,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bdbfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:58, skipping insertion in model container [2023-11-19 08:05:58,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:57" (2/3) ... [2023-11-19 08:05:58,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bdbfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:58, skipping insertion in model container [2023-11-19 08:05:58,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:58" (3/3) ... [2023-11-19 08:05:58,580 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2023-11-19 08:05:58,590 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:05:58,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:58,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:58,602 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:05:58,732 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-19 08:05:58,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 203 transitions, 441 flow [2023-11-19 08:05:58,883 INFO L124 PetriNetUnfolderBase]: 14/198 cut-off events. [2023-11-19 08:05:58,883 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 08:05:58,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 198 events. 14/198 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 170 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 160. Up to 2 conditions per place. [2023-11-19 08:05:58,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 203 transitions, 441 flow [2023-11-19 08:05:58,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 183 transitions, 396 flow [2023-11-19 08:05:58,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:58,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 183 transitions, 396 flow [2023-11-19 08:05:58,914 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 183 transitions, 396 flow [2023-11-19 08:05:58,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 183 transitions, 396 flow [2023-11-19 08:05:59,015 INFO L124 PetriNetUnfolderBase]: 14/183 cut-off events. [2023-11-19 08:05:59,015 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 08:05:59,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 183 events. 14/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 160. Up to 2 conditions per place. [2023-11-19 08:05:59,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 4924 [2023-11-19 08:06:08,808 INFO L134 LiptonReduction]: Checked pairs total: 6697 [2023-11-19 08:06:08,809 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-11-19 08:06:08,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:08,856 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;@264413ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:08,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:06:08,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:06:08,885 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-11-19 08:06:08,886 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 08:06:08,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:08,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:08,888 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 3 more)] === [2023-11-19 08:06:08,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1635008920, now seen corresponding path program 1 times [2023-11-19 08:06:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492673682] [2023-11-19 08:06:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:09,509 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 08:06:09,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492673682] [2023-11-19 08:06:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492673682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225988578] [2023-11-19 08:06:09,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:09,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:09,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 374 [2023-11-19 08:06:09,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:09,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:09,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 374 [2023-11-19 08:06:09,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:10,739 INFO L124 PetriNetUnfolderBase]: 5510/6994 cut-off events. [2023-11-19 08:06:10,740 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-19 08:06:10,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14642 conditions, 6994 events. 5510/6994 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24329 event pairs, 3165 based on Foata normal form. 0/5489 useless extension candidates. Maximal degree in co-relation 12560. Up to 5632 conditions per place. [2023-11-19 08:06:10,807 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 56 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-11-19 08:06:10,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 278 flow [2023-11-19 08:06:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-11-19 08:06:10,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2023-11-19 08:06:10,833 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-11-19 08:06:10,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-11-19 08:06:10,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:10,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-11-19 08:06:10,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 08:06:10,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:10,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:10,864 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 106 flow. Second operand 4 states and 744 transitions. [2023-11-19 08:06:10,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 278 flow [2023-11-19 08:06:10,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 250 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-19 08:06:10,903 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 100 flow [2023-11-19 08:06:10,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-19 08:06:10,911 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-11-19 08:06:10,911 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 100 flow [2023-11-19 08:06:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:10,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:10,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:10,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:10,914 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 3 more)] === [2023-11-19 08:06:10,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash -214896760, now seen corresponding path program 1 times [2023-11-19 08:06:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:10,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185242857] [2023-11-19 08:06:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:11,112 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 08:06:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185242857] [2023-11-19 08:06:11,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185242857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:11,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759955837] [2023-11-19 08:06:11,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:11,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 374 [2023-11-19 08:06:11,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 08:06:11,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:11,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 374 [2023-11-19 08:06:11,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:12,414 INFO L124 PetriNetUnfolderBase]: 6702/8498 cut-off events. [2023-11-19 08:06:12,415 INFO L125 PetriNetUnfolderBase]: For 1706/1706 co-relation queries the response was YES. [2023-11-19 08:06:12,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19062 conditions, 8498 events. 6702/8498 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30434 event pairs, 4005 based on Foata normal form. 0/6741 useless extension candidates. Maximal degree in co-relation 6141. Up to 6994 conditions per place. [2023-11-19 08:06:12,483 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-19 08:06:12,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 280 flow [2023-11-19 08:06:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-11-19 08:06:12,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49732620320855614 [2023-11-19 08:06:12,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-11-19 08:06:12,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-11-19 08:06:12,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:12,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-11-19 08:06:12,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 08:06:12,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:12,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:12,507 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 100 flow. Second operand 4 states and 744 transitions. [2023-11-19 08:06:12,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 280 flow [2023-11-19 08:06:12,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 270 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:12,513 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 108 flow [2023-11-19 08:06:12,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-19 08:06:12,514 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-19 08:06:12,515 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 108 flow [2023-11-19 08:06:12,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 08:06:12,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:12,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:06:12,517 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 3 more)] === [2023-11-19 08:06:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2064144761, now seen corresponding path program 1 times [2023-11-19 08:06:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:12,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481082545] [2023-11-19 08:06:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:12,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:06:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:12,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481082545] [2023-11-19 08:06:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481082545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:12,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:12,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518146786] [2023-11-19 08:06:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:12,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:12,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 374 [2023-11-19 08:06:12,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states 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 08:06:12,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:12,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 374 [2023-11-19 08:06:12,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:14,359 INFO L124 PetriNetUnfolderBase]: 8892/11260 cut-off events. [2023-11-19 08:06:14,359 INFO L125 PetriNetUnfolderBase]: For 2981/2981 co-relation queries the response was YES. [2023-11-19 08:06:14,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26391 conditions, 11260 events. 8892/11260 cut-off events. For 2981/2981 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 42103 event pairs, 4945 based on Foata normal form. 0/9117 useless extension candidates. Maximal degree in co-relation 9874. Up to 8498 conditions per place. [2023-11-19 08:06:14,439 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 61 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-11-19 08:06:14,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 304 flow [2023-11-19 08:06:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2023-11-19 08:06:14,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979946524064171 [2023-11-19 08:06:14,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2023-11-19 08:06:14,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2023-11-19 08:06:14,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:14,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2023-11-19 08:06:14,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 08:06:14,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:14,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:14,454 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 108 flow. Second operand 4 states and 745 transitions. [2023-11-19 08:06:14,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 304 flow [2023-11-19 08:06:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 294 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:14,459 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 116 flow [2023-11-19 08:06:14,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-19 08:06:14,461 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-19 08:06:14,464 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 116 flow [2023-11-19 08:06:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states 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 08:06:14,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:14,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:06:14,468 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 3 more)] === [2023-11-19 08:06:14,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -109097529, now seen corresponding path program 1 times [2023-11-19 08:06:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011846979] [2023-11-19 08:06:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:14,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:14,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011846979] [2023-11-19 08:06:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011846979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:14,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243340380] [2023-11-19 08:06:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:14,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 374 [2023-11-19 08:06:14,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 08:06:14,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:14,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 374 [2023-11-19 08:06:14,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:16,653 INFO L124 PetriNetUnfolderBase]: 11618/14686 cut-off events. [2023-11-19 08:06:16,653 INFO L125 PetriNetUnfolderBase]: For 5867/5867 co-relation queries the response was YES. [2023-11-19 08:06:16,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37018 conditions, 14686 events. 11618/14686 cut-off events. For 5867/5867 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 56973 event pairs, 6749 based on Foata normal form. 0/12113 useless extension candidates. Maximal degree in co-relation 12691. Up to 11260 conditions per place. [2023-11-19 08:06:16,741 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 63 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-11-19 08:06:16,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 324 flow [2023-11-19 08:06:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:06:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2023-11-19 08:06:16,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979946524064171 [2023-11-19 08:06:16,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2023-11-19 08:06:16,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2023-11-19 08:06:16,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:16,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2023-11-19 08:06:16,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 08:06:16,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:16,755 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 08:06:16,756 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 116 flow. Second operand 4 states and 745 transitions. [2023-11-19 08:06:16,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 324 flow [2023-11-19 08:06:16,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:16,771 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 124 flow [2023-11-19 08:06:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 08:06:16,773 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-19 08:06:16,774 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 124 flow [2023-11-19 08:06:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 08:06:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:16,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:06:16,776 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 3 more)] === [2023-11-19 08:06:16,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash 595453295, now seen corresponding path program 1 times [2023-11-19 08:06:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:16,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914680302] [2023-11-19 08:06:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:16,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:16,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914680302] [2023-11-19 08:06:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914680302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:06:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791708092] [2023-11-19 08:06:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:16,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 374 [2023-11-19 08:06:16,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 08:06:16,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:16,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 374 [2023-11-19 08:06:16,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:06:18,462 INFO L124 PetriNetUnfolderBase]: 11618/14687 cut-off events. [2023-11-19 08:06:18,462 INFO L125 PetriNetUnfolderBase]: For 6756/6756 co-relation queries the response was YES. [2023-11-19 08:06:18,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39029 conditions, 14687 events. 11618/14687 cut-off events. For 6756/6756 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 55428 event pairs, 9045 based on Foata normal form. 0/12114 useless extension candidates. Maximal degree in co-relation 13469. Up to 14687 conditions per place. [2023-11-19 08:06:18,542 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-19 08:06:18,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 212 flow [2023-11-19 08:06:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:06:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-11-19 08:06:18,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928698752228164 [2023-11-19 08:06:18,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-11-19 08:06:18,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-11-19 08:06:18,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:06:18,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-11-19 08:06:18,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 08:06:18,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 08:06:18,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 08:06:18,554 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 124 flow. Second operand 3 states and 553 transitions. [2023-11-19 08:06:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 212 flow [2023-11-19 08:06:18,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 206 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:06:18,751 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 130 flow [2023-11-19 08:06:18,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-19 08:06:18,754 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-19 08:06:18,755 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 130 flow [2023-11-19 08:06:18,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 08:06:18,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:06:18,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:06:18,756 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 3 more)] === [2023-11-19 08:06:18,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1262491421, now seen corresponding path program 1 times [2023-11-19 08:06:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:18,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740812925] [2023-11-19 08:06:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:06:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740812925] [2023-11-19 08:06:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740812925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829120144] [2023-11-19 08:06:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:19,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:19,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_021f23a9-b64d-4e8b-a925-58d5deeb0045/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:06:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:19,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 08:06:19,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:19,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 08:06:19,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:06:19,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 08:06:20,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 08:06:20,866 INFO L349 Elim1Store]: treesize reduction 36, result has 59.1 percent of original size [2023-11-19 08:06:20,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 105 [2023-11-19 08:06:20,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:06:20,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2023-11-19 08:06:21,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 08:06:21,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 08:06:21,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:06:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:21,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:21,635 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 08:06:21,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 58 [2023-11-19 08:06:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:06:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829120144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:21,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:21,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 7] total 22 [2023-11-19 08:06:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040733192] [2023-11-19 08:06:21,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:06:21,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:06:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:06:23,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 374 [2023-11-19 08:06:23,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 130 flow. Second operand has 23 states, 23 states have (on average 149.30434782608697) internal successors, (3434), 23 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:23,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:06:23,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 374 [2023-11-19 08:06:23,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand