./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl --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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:06,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:20:06,519 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:20:06,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:20:06,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:20:06,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:20:06,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:20:06,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:20:06,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:20:06,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:20:06,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:20:06,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:20:06,584 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:20:06,586 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:20:06,587 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:20:06,587 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:20:06,588 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:20:06,588 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:20:06,589 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:20:06,590 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:20:06,590 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:20:06,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:20:06,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:20:06,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:20:06,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:20:06,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:20:06,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:20:06,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:20:06,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:06,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:20:06,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:20:06,597 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:20:06,597 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:20:06,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:20:06,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:20:06,598 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:20:06,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:20:06,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:20:06,599 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:20:06,599 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_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-12 02:20:06,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:20:07,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:20:07,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:20:07,023 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:20:07,024 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:20:07,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-12 02:20:10,357 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:20:10,615 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:20:10,616 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-12 02:20:10,627 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/data/ee8efdbe6/35ec2a6be8544903aa63507ece3bc448/FLAG3dab5b0d7 [2023-11-12 02:20:10,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/data/ee8efdbe6/35ec2a6be8544903aa63507ece3bc448 [2023-11-12 02:20:10,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:20:10,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:20:10,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:10,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:20:10,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:20:10,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:10,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15bb7f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10, skipping insertion in model container [2023-11-12 02:20:10,666 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:10,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:20:10,913 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_06e7083e-bbd4-461d-851d-e4eafcaaeb27/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-12 02:20:10,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:10,940 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:20:10,967 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_06e7083e-bbd4-461d-851d-e4eafcaaeb27/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-12 02:20:10,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:10,980 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:10,980 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:10,990 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:20:10,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10 WrapperNode [2023-11-12 02:20:10,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:10,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:10,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:20:10,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:20:11,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,016 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,044 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2023-11-12 02:20:11,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:11,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:20:11,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:20:11,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:20:11,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:20:11,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:20:11,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:20:11,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:20:11,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (1/1) ... [2023-11-12 02:20:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:11,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:11,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:20:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:20:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:20:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:20:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:20:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:20:11,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:20:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:20:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:20:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:20:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:20:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:20:11,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:20:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:20:11,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:20:11,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:20:11,173 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:20:11,343 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:20:11,345 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:20:11,787 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:20:11,992 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:20:11,992 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:20:11,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:11 BoogieIcfgContainer [2023-11-12 02:20:11,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:20:11,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:20:11,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:20:12,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:20:12,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:20:10" (1/3) ... [2023-11-12 02:20:12,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6de48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:12, skipping insertion in model container [2023-11-12 02:20:12,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:10" (2/3) ... [2023-11-12 02:20:12,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6de48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:12, skipping insertion in model container [2023-11-12 02:20:12,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:11" (3/3) ... [2023-11-12 02:20:12,006 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-12 02:20:12,017 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:20:12,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:20:12,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:20:12,030 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:20:12,126 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:20:12,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 150 transitions, 314 flow [2023-11-12 02:20:12,287 INFO L124 PetriNetUnfolderBase]: 11/148 cut-off events. [2023-11-12 02:20:12,288 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:12,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 11/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2023-11-12 02:20:12,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 150 transitions, 314 flow [2023-11-12 02:20:12,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 139 transitions, 290 flow [2023-11-12 02:20:12,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:20:12,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 139 transitions, 290 flow [2023-11-12 02:20:12,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 139 transitions, 290 flow [2023-11-12 02:20:12,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 139 transitions, 290 flow [2023-11-12 02:20:12,422 INFO L124 PetriNetUnfolderBase]: 11/139 cut-off events. [2023-11-12 02:20:12,423 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:12,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 139 events. 11/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2023-11-12 02:20:12,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 816 [2023-11-12 02:20:18,717 INFO L134 LiptonReduction]: Checked pairs total: 932 [2023-11-12 02:20:18,717 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-12 02:20:18,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:20:18,753 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;@6b678ee6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:20:18,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:20:18,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:20:18,771 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:20:18,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:18,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:18,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:18,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -116407992, now seen corresponding path program 1 times [2023-11-12 02:20:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:18,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760056507] [2023-11-12 02:20:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760056507] [2023-11-12 02:20:19,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760056507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:19,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:19,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736447457] [2023-11-12 02:20:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:19,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:19,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-12 02:20:19,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:19,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-12 02:20:19,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:19,488 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-11-12 02:20:19,488 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-12 02:20:19,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 86 events. 48/86 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 9 based on Foata normal form. 4/69 useless extension candidates. Maximal degree in co-relation 144. Up to 65 conditions per place. [2023-11-12 02:20:19,494 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 20 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-12 02:20:19,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 107 flow [2023-11-12 02:20:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:20:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-11-12 02:20:19,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46734234234234234 [2023-11-12 02:20:19,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-11-12 02:20:19,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-11-12 02:20:19,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:19,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-11-12 02:20:19,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,548 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 415 transitions. [2023-11-12 02:20:19,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 107 flow [2023-11-12 02:20:19,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 23 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:20:19,554 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-12 02:20:19,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-12 02:20:19,562 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:20:19,562 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-12 02:20:19,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:19,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:19,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:20:19,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:19,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1551974074, now seen corresponding path program 2 times [2023-11-12 02:20:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:19,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019583567] [2023-11-12 02:20:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:19,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:19,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019583567] [2023-11-12 02:20:19,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019583567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:19,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:19,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:19,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33407415] [2023-11-12 02:20:19,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:19,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:19,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 296 [2023-11-12 02:20:19,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:19,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:19,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 296 [2023-11-12 02:20:19,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:20,013 INFO L124 PetriNetUnfolderBase]: 55/107 cut-off events. [2023-11-12 02:20:20,013 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-12 02:20:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 107 events. 55/107 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 234 event pairs, 32 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 90. Up to 87 conditions per place. [2023-11-12 02:20:20,015 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 18 selfloop transitions, 2 changer transitions 7/27 dead transitions. [2023-11-12 02:20:20,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 131 flow [2023-11-12 02:20:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:20:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-11-12 02:20:20,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484797297297297 [2023-11-12 02:20:20,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-11-12 02:20:20,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-11-12 02:20:20,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:20,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-11-12 02:20:20,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:20,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:20,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:20,028 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 531 transitions. [2023-11-12 02:20:20,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 131 flow [2023-11-12 02:20:20,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:20:20,030 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-12 02:20:20,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-12 02:20:20,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-12 02:20:20,032 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-12 02:20:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:20,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:20,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:20:20,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:20,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -852200183, now seen corresponding path program 1 times [2023-11-12 02:20:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819965298] [2023-11-12 02:20:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:20,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:20,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819965298] [2023-11-12 02:20:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819965298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:20,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:20:20,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377610687] [2023-11-12 02:20:20,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:20,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:20:20,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:20:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:20:20,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 296 [2023-11-12 02:20:20,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:20,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:20,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 296 [2023-11-12 02:20:20,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:21,168 INFO L124 PetriNetUnfolderBase]: 64/122 cut-off events. [2023-11-12 02:20:21,168 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-12 02:20:21,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 122 events. 64/122 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 323 event pairs, 1 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 316. Up to 71 conditions per place. [2023-11-12 02:20:21,171 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 31 selfloop transitions, 9 changer transitions 5/45 dead transitions. [2023-11-12 02:20:21,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 227 flow [2023-11-12 02:20:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:20:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:20:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 997 transitions. [2023-11-12 02:20:21,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42103040540540543 [2023-11-12 02:20:21,178 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 997 transitions. [2023-11-12 02:20:21,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 997 transitions. [2023-11-12 02:20:21,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:21,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 997 transitions. [2023-11-12 02:20:21,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.625) internal successors, (997), 8 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:21,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:21,195 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:21,195 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 8 states and 997 transitions. [2023-11-12 02:20:21,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 227 flow [2023-11-12 02:20:21,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 219 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:21,199 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 112 flow [2023-11-12 02:20:21,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-12 02:20:21,200 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-12 02:20:21,201 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 112 flow [2023-11-12 02:20:21,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:21,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:21,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:20:21,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:21,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1611318765, now seen corresponding path program 2 times [2023-11-12 02:20:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:21,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461242674] [2023-11-12 02:20:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461242674] [2023-11-12 02:20:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461242674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:21,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:20:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694980179] [2023-11-12 02:20:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:20:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:20:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:20:21,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 296 [2023-11-12 02:20:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:21,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 296 [2023-11-12 02:20:21,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:22,118 INFO L124 PetriNetUnfolderBase]: 70/134 cut-off events. [2023-11-12 02:20:22,118 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-12 02:20:22,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 134 events. 70/134 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 11 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 440. Up to 98 conditions per place. [2023-11-12 02:20:22,121 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 28 selfloop transitions, 11 changer transitions 5/44 dead transitions. [2023-11-12 02:20:22,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 276 flow [2023-11-12 02:20:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:20:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:20:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2023-11-12 02:20:22,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155405405405405 [2023-11-12 02:20:22,127 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2023-11-12 02:20:22,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2023-11-12 02:20:22,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:22,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2023-11-12 02:20:22,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:22,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:22,141 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:22,141 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 112 flow. Second operand 8 states and 984 transitions. [2023-11-12 02:20:22,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 276 flow [2023-11-12 02:20:22,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 244 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-12 02:20:22,146 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 165 flow [2023-11-12 02:20:22,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-12 02:20:22,148 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-12 02:20:22,148 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 165 flow [2023-11-12 02:20:22,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:22,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:22,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:22,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:20:22,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:22,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash 72141473, now seen corresponding path program 3 times [2023-11-12 02:20:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997598481] [2023-11-12 02:20:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:22,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997598481] [2023-11-12 02:20:22,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997598481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:22,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:22,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:20:22,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070733050] [2023-11-12 02:20:22,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:22,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:20:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:20:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:20:22,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 296 [2023-11-12 02:20:22,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:22,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:22,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 296 [2023-11-12 02:20:22,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:23,008 INFO L124 PetriNetUnfolderBase]: 66/130 cut-off events. [2023-11-12 02:20:23,008 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-12 02:20:23,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 130 events. 66/130 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 11 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 457. Up to 94 conditions per place. [2023-11-12 02:20:23,011 INFO L140 encePairwiseOnDemand]: 287/296 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-11-12 02:20:23,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 298 flow [2023-11-12 02:20:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:20:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:20:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2023-11-12 02:20:23,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155405405405405 [2023-11-12 02:20:23,017 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2023-11-12 02:20:23,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2023-11-12 02:20:23,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:23,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2023-11-12 02:20:23,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,027 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 296.0) internal successors, (2664), 9 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,028 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 165 flow. Second operand 8 states and 984 transitions. [2023-11-12 02:20:23,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 298 flow [2023-11-12 02:20:23,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 281 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-12 02:20:23,035 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 184 flow [2023-11-12 02:20:23,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-12 02:20:23,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-12 02:20:23,038 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 184 flow [2023-11-12 02:20:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:23,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:20:23,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:23,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1749229271, now seen corresponding path program 1 times [2023-11-12 02:20:23,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314081058] [2023-11-12 02:20:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314081058] [2023-11-12 02:20:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314081058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140781841] [2023-11-12 02:20:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:23,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:23,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:20:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:23,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:20:23,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:23,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140781841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:23,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:20:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965059106] [2023-11-12 02:20:23,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:23,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:20:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:20:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:20:23,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 296 [2023-11-12 02:20:23,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 184 flow. Second operand has 12 states, 12 states have (on average 124.16666666666667) internal successors, (1490), 12 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:23,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 296 [2023-11-12 02:20:23,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:23,861 INFO L124 PetriNetUnfolderBase]: 106/217 cut-off events. [2023-11-12 02:20:23,861 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-11-12 02:20:23,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 217 events. 106/217 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 728 event pairs, 40 based on Foata normal form. 8/217 useless extension candidates. Maximal degree in co-relation 815. Up to 122 conditions per place. [2023-11-12 02:20:23,865 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 50 selfloop transitions, 7 changer transitions 4/61 dead transitions. [2023-11-12 02:20:23,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 479 flow [2023-11-12 02:20:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:20:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:20:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 772 transitions. [2023-11-12 02:20:23,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346846846846847 [2023-11-12 02:20:23,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 772 transitions. [2023-11-12 02:20:23,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 772 transitions. [2023-11-12 02:20:23,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:23,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 772 transitions. [2023-11-12 02:20:23,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.66666666666666) internal successors, (772), 6 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,877 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,877 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 184 flow. Second operand 6 states and 772 transitions. [2023-11-12 02:20:23,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 479 flow [2023-11-12 02:20:23,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 425 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-12 02:20:23,881 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 237 flow [2023-11-12 02:20:23,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-12 02:20:23,882 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-12 02:20:23,883 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 237 flow [2023-11-12 02:20:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 124.16666666666667) internal successors, (1490), 12 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:23,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:23,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:20:24,091 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:24,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1996485148, now seen corresponding path program 1 times [2023-11-12 02:20:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315687718] [2023-11-12 02:20:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:24,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315687718] [2023-11-12 02:20:24,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315687718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218451348] [2023-11-12 02:20:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:24,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:24,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:24,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:24,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:20:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:24,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:20:24,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:24,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:20:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218451348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:24,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:20:24,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 02:20:24,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566176213] [2023-11-12 02:20:24,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:24,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:24,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:20:24,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 296 [2023-11-12 02:20:24,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:24,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:24,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 296 [2023-11-12 02:20:24,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:24,518 INFO L124 PetriNetUnfolderBase]: 117/246 cut-off events. [2023-11-12 02:20:24,518 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-11-12 02:20:24,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 246 events. 117/246 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 902 event pairs, 23 based on Foata normal form. 20/246 useless extension candidates. Maximal degree in co-relation 662. Up to 95 conditions per place. [2023-11-12 02:20:24,521 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 36 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-11-12 02:20:24,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 429 flow [2023-11-12 02:20:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:20:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 561 transitions. [2023-11-12 02:20:24,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47381756756756754 [2023-11-12 02:20:24,525 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 561 transitions. [2023-11-12 02:20:24,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 561 transitions. [2023-11-12 02:20:24,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:24,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 561 transitions. [2023-11-12 02:20:24,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:24,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:24,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:24,531 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 237 flow. Second operand 4 states and 561 transitions. [2023-11-12 02:20:24,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 429 flow [2023-11-12 02:20:24,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 404 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-12 02:20:24,536 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 205 flow [2023-11-12 02:20:24,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-11-12 02:20:24,537 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-12 02:20:24,538 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 205 flow [2023-11-12 02:20:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:24,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:20:24,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:24,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1399666058, now seen corresponding path program 2 times [2023-11-12 02:20:24,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93999371] [2023-11-12 02:20:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:24,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:25,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93999371] [2023-11-12 02:20:25,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93999371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:25,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700432223] [2023-11-12 02:20:25,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:20:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:25,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:25,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:20:25,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:20:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:25,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:20:25,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:25,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:25,891 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:20:25,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-12 02:20:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700432223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:26,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:26,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:20:26,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251599383] [2023-11-12 02:20:26,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:26,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:20:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:20:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:20:26,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 296 [2023-11-12 02:20:26,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 205 flow. Second operand has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:26,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:26,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 296 [2023-11-12 02:20:26,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:28,257 INFO L124 PetriNetUnfolderBase]: 267/514 cut-off events. [2023-11-12 02:20:28,257 INFO L125 PetriNetUnfolderBase]: For 1025/1025 co-relation queries the response was YES. [2023-11-12 02:20:28,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 514 events. 267/514 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2219 event pairs, 39 based on Foata normal form. 20/444 useless extension candidates. Maximal degree in co-relation 1494. Up to 277 conditions per place. [2023-11-12 02:20:28,266 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 96 selfloop transitions, 47 changer transitions 0/143 dead transitions. [2023-11-12 02:20:28,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 143 transitions, 1102 flow [2023-11-12 02:20:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:20:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:20:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2168 transitions. [2023-11-12 02:20:28,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069069069069069 [2023-11-12 02:20:28,279 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2168 transitions. [2023-11-12 02:20:28,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2168 transitions. [2023-11-12 02:20:28,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:28,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2168 transitions. [2023-11-12 02:20:28,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 120.44444444444444) internal successors, (2168), 18 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,307 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 296.0) internal successors, (5624), 19 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,308 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 205 flow. Second operand 18 states and 2168 transitions. [2023-11-12 02:20:28,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 143 transitions, 1102 flow [2023-11-12 02:20:28,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 143 transitions, 971 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-11-12 02:20:28,319 INFO L231 Difference]: Finished difference. Result has 61 places, 79 transitions, 680 flow [2023-11-12 02:20:28,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=680, PETRI_PLACES=61, PETRI_TRANSITIONS=79} [2023-11-12 02:20:28,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-11-12 02:20:28,320 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 79 transitions, 680 flow [2023-11-12 02:20:28,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 116.25) internal successors, (2325), 20 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:28,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:28,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:20:28,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:20:28,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:28,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1248056012, now seen corresponding path program 3 times [2023-11-12 02:20:28,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421616082] [2023-11-12 02:20:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:29,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421616082] [2023-11-12 02:20:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421616082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:29,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411027144] [2023-11-12 02:20:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:20:29,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:29,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:29,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:29,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:20:29,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:20:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:29,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:20:29,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:20:29,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:20:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:30,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:30,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:20:30,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:20:30,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:20:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411027144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:30,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-12 02:20:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241852419] [2023-11-12 02:20:30,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:20:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:20:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:20:31,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 296 [2023-11-12 02:20:31,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 79 transitions, 680 flow. Second operand has 23 states, 23 states have (on average 111.95652173913044) internal successors, (2575), 23 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:31,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:31,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 296 [2023-11-12 02:20:31,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:33,763 INFO L124 PetriNetUnfolderBase]: 480/937 cut-off events. [2023-11-12 02:20:33,764 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2023-11-12 02:20:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4387 conditions, 937 events. 480/937 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4808 event pairs, 71 based on Foata normal form. 26/827 useless extension candidates. Maximal degree in co-relation 3498. Up to 349 conditions per place. [2023-11-12 02:20:33,776 INFO L140 encePairwiseOnDemand]: 288/296 looper letters, 135 selfloop transitions, 77 changer transitions 2/214 dead transitions. [2023-11-12 02:20:33,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 214 transitions, 2051 flow [2023-11-12 02:20:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:20:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:20:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2323 transitions. [2023-11-12 02:20:33,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39239864864864865 [2023-11-12 02:20:33,786 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2323 transitions. [2023-11-12 02:20:33,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2323 transitions. [2023-11-12 02:20:33,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:33,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2323 transitions. [2023-11-12 02:20:33,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 116.15) internal successors, (2323), 20 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:33,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 296.0) internal successors, (6216), 21 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:33,808 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 296.0) internal successors, (6216), 21 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:33,808 INFO L175 Difference]: Start difference. First operand has 61 places, 79 transitions, 680 flow. Second operand 20 states and 2323 transitions. [2023-11-12 02:20:33,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 214 transitions, 2051 flow [2023-11-12 02:20:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 214 transitions, 1969 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:33,832 INFO L231 Difference]: Finished difference. Result has 88 places, 132 transitions, 1485 flow [2023-11-12 02:20:33,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1485, PETRI_PLACES=88, PETRI_TRANSITIONS=132} [2023-11-12 02:20:33,833 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-11-12 02:20:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 132 transitions, 1485 flow [2023-11-12 02:20:33,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.95652173913044) internal successors, (2575), 23 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:33,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:33,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:33,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:34,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:34,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1097909372, now seen corresponding path program 4 times [2023-11-12 02:20:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365027285] [2023-11-12 02:20:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:34,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365027285] [2023-11-12 02:20:34,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365027285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494977351] [2023-11-12 02:20:34,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:20:34,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:34,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:34,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:20:34,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:20:34,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:34,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:20:34,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:20:35,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:20:35,214 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:20:35,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:20:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:35,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:35,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:20:35,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:20:35,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:20:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494977351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:35,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-12 02:20:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423208531] [2023-11-12 02:20:35,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:20:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:20:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:20:38,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:20:38,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 296 [2023-11-12 02:20:38,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 132 transitions, 1485 flow. Second operand has 23 states, 23 states have (on average 111.8695652173913) internal successors, (2573), 23 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:38,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:38,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 296 [2023-11-12 02:20:38,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:39,775 INFO L124 PetriNetUnfolderBase]: 344/727 cut-off events. [2023-11-12 02:20:39,776 INFO L125 PetriNetUnfolderBase]: For 5261/5261 co-relation queries the response was YES. [2023-11-12 02:20:39,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 727 events. 344/727 cut-off events. For 5261/5261 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3767 event pairs, 132 based on Foata normal form. 72/774 useless extension candidates. Maximal degree in co-relation 3701. Up to 499 conditions per place. [2023-11-12 02:20:39,786 INFO L140 encePairwiseOnDemand]: 289/296 looper letters, 99 selfloop transitions, 14 changer transitions 9/122 dead transitions. [2023-11-12 02:20:39,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1480 flow [2023-11-12 02:20:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:20:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:20:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1041 transitions. [2023-11-12 02:20:39,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39076576576576577 [2023-11-12 02:20:39,792 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1041 transitions. [2023-11-12 02:20:39,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1041 transitions. [2023-11-12 02:20:39,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:39,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1041 transitions. [2023-11-12 02:20:39,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:39,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:39,821 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 296.0) internal successors, (2960), 10 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:39,821 INFO L175 Difference]: Start difference. First operand has 88 places, 132 transitions, 1485 flow. Second operand 9 states and 1041 transitions. [2023-11-12 02:20:39,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1480 flow [2023-11-12 02:20:39,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 122 transitions, 1301 flow, removed 82 selfloop flow, removed 8 redundant places. [2023-11-12 02:20:39,871 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 889 flow [2023-11-12 02:20:39,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=889, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2023-11-12 02:20:39,873 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-11-12 02:20:39,874 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 889 flow [2023-11-12 02:20:39,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.8695652173913) internal successors, (2573), 23 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:39,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:39,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:39,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:20:40,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:40,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1167170695, now seen corresponding path program 5 times [2023-11-12 02:20:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:40,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329010884] [2023-11-12 02:20:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329010884] [2023-11-12 02:20:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329010884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:41,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950776888] [2023-11-12 02:20:41,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:20:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:41,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:41,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:20:41,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:20:41,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:41,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:20:41,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:41,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:20:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950776888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:41,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:20:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-11-12 02:20:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144366793] [2023-11-12 02:20:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:41,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:20:41,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 296 [2023-11-12 02:20:41,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 889 flow. Second operand has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:41,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 296 [2023-11-12 02:20:41,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:41,581 INFO L124 PetriNetUnfolderBase]: 299/610 cut-off events. [2023-11-12 02:20:41,582 INFO L125 PetriNetUnfolderBase]: For 3433/3433 co-relation queries the response was YES. [2023-11-12 02:20:41,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 610 events. 299/610 cut-off events. For 3433/3433 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2876 event pairs, 99 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 2862. Up to 402 conditions per place. [2023-11-12 02:20:41,590 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 72 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2023-11-12 02:20:41,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 1051 flow [2023-11-12 02:20:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:20:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-11-12 02:20:41,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484797297297297 [2023-11-12 02:20:41,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-11-12 02:20:41,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-11-12 02:20:41,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:41,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-11-12 02:20:41,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,599 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 889 flow. Second operand 4 states and 531 transitions. [2023-11-12 02:20:41,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 1051 flow [2023-11-12 02:20:41,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 975 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-11-12 02:20:41,623 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 782 flow [2023-11-12 02:20:41,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=782, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-11-12 02:20:41,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-12 02:20:41,625 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 782 flow [2023-11-12 02:20:41,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:41,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:41,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:41,832 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:41,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -736814603, now seen corresponding path program 1 times [2023-11-12 02:20:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:41,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872569003] [2023-11-12 02:20:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:41,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:42,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872569003] [2023-11-12 02:20:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872569003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119555963] [2023-11-12 02:20:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:42,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:42,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:42,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:42,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:20:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:42,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:20:42,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:43,639 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:20:43,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-12 02:20:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:43,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:44,259 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:20:44,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-12 02:20:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119555963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:45,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:45,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-12 02:20:45,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389702532] [2023-11-12 02:20:45,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:45,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:20:45,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:20:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:20:48,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 296 [2023-11-12 02:20:48,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 782 flow. Second operand has 32 states, 32 states have (on average 99.6875) internal successors, (3190), 32 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:48,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:48,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 296 [2023-11-12 02:20:48,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:51,787 INFO L124 PetriNetUnfolderBase]: 332/693 cut-off events. [2023-11-12 02:20:51,788 INFO L125 PetriNetUnfolderBase]: For 3158/3158 co-relation queries the response was YES. [2023-11-12 02:20:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3404 conditions, 693 events. 332/693 cut-off events. For 3158/3158 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3596 event pairs, 61 based on Foata normal form. 2/681 useless extension candidates. Maximal degree in co-relation 3148. Up to 436 conditions per place. [2023-11-12 02:20:51,797 INFO L140 encePairwiseOnDemand]: 285/296 looper letters, 98 selfloop transitions, 45 changer transitions 10/153 dead transitions. [2023-11-12 02:20:51,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1418 flow [2023-11-12 02:20:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:20:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:20:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1965 transitions. [2023-11-12 02:20:51,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3493954480796586 [2023-11-12 02:20:51,807 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1965 transitions. [2023-11-12 02:20:51,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1965 transitions. [2023-11-12 02:20:51,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:51,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1965 transitions. [2023-11-12 02:20:51,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 103.42105263157895) internal successors, (1965), 19 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:51,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 296.0) internal successors, (5920), 20 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:51,827 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 296.0) internal successors, (5920), 20 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:51,827 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 782 flow. Second operand 19 states and 1965 transitions. [2023-11-12 02:20:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1418 flow [2023-11-12 02:20:51,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1348 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-12 02:20:51,879 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 970 flow [2023-11-12 02:20:51,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=970, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2023-11-12 02:20:51,880 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2023-11-12 02:20:51,880 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 970 flow [2023-11-12 02:20:51,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.6875) internal successors, (3190), 32 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:51,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:51,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:20:52,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:52,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2033705013, now seen corresponding path program 6 times [2023-11-12 02:20:52,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:52,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823811942] [2023-11-12 02:20:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:52,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:53,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:53,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823811942] [2023-11-12 02:20:53,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823811942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:53,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539704220] [2023-11-12 02:20:53,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:20:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:53,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:53,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:20:53,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:20:53,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:53,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:20:53,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:20:53,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:20:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:53,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:53,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:20:53,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:20:53,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:20:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539704220] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:53,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:20:53,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 18 [2023-11-12 02:20:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474072067] [2023-11-12 02:20:53,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:53,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:20:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:53,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:20:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=287, Unknown=3, NotChecked=0, Total=342 [2023-11-12 02:20:53,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 296 [2023-11-12 02:20:53,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 970 flow. Second operand has 6 states, 6 states have (on average 114.66666666666667) internal successors, (688), 6 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:53,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 296 [2023-11-12 02:20:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:54,171 INFO L124 PetriNetUnfolderBase]: 323/650 cut-off events. [2023-11-12 02:20:54,171 INFO L125 PetriNetUnfolderBase]: For 3498/3498 co-relation queries the response was YES. [2023-11-12 02:20:54,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3451 conditions, 650 events. 323/650 cut-off events. For 3498/3498 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3105 event pairs, 87 based on Foata normal form. 16/652 useless extension candidates. Maximal degree in co-relation 3392. Up to 343 conditions per place. [2023-11-12 02:20:54,180 INFO L140 encePairwiseOnDemand]: 291/296 looper letters, 68 selfloop transitions, 35 changer transitions 0/103 dead transitions. [2023-11-12 02:20:54,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 1210 flow [2023-11-12 02:20:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:20:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-11-12 02:20:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39797297297297296 [2023-11-12 02:20:54,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-11-12 02:20:54,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-11-12 02:20:54,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:54,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-11-12 02:20:54,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:54,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:54,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:54,188 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 970 flow. Second operand 5 states and 589 transitions. [2023-11-12 02:20:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 1210 flow [2023-11-12 02:20:54,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 1117 flow, removed 29 selfloop flow, removed 11 redundant places. [2023-11-12 02:20:54,211 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 966 flow [2023-11-12 02:20:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=966, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2023-11-12 02:20:54,212 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-12 02:20:54,212 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 966 flow [2023-11-12 02:20:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.66666666666667) internal successors, (688), 6 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:54,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:54,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:54,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7083e-bbd4-461d-851d-e4eafcaaeb27/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:20:54,418 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:54,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -515606291, now seen corresponding path program 2 times [2023-11-12 02:20:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741983899] [2023-11-12 02:20:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat