./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya --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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:08:49,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:08:49,522 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:08:49,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:08:49,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:08:49,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:08:49,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:08:49,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:08:49,554 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:08:49,554 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:08:49,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:08:49,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:08:49,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:08:49,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:08:49,558 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:08:49,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:08:49,559 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:08:49,559 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:08:49,560 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:08:49,560 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:08:49,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:08:49,561 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:08:49,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:08:49,562 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:08:49,563 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:08:49,563 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:08:49,564 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:08:49,564 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:08:49,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:08:49,565 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:08:49,566 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:08:49,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:08:49,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:08:49,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:08:49,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:08:49,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:08:49,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:08:49,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:08:49,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:08:49,569 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:08:49,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:08:49,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:08:49,570 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_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2023-11-29 04:08:49,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:08:49,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:08:49,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:08:49,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:08:49,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:08:49,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-29 04:08:52,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:08:52,763 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:08:52,764 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-29 04:08:52,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/data/e92fbbe78/d16d650a94d348c88ed837298c124979/FLAG268258dcd [2023-11-29 04:08:52,785 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/data/e92fbbe78/d16d650a94d348c88ed837298c124979 [2023-11-29 04:08:52,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:08:52,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:08:52,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:08:52,790 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:08:52,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:08:52,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:08:52" (1/1) ... [2023-11-29 04:08:52,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128e31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:52, skipping insertion in model container [2023-11-29 04:08:52,797 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:08:52" (1/1) ... [2023-11-29 04:08:52,818 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:08:52,963 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_2869b06e-69f4-4975-949b-fc6a0fc040f9/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-29 04:08:52,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:08:52,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:08:52,999 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_2869b06e-69f4-4975-949b-fc6a0fc040f9/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-29 04:08:53,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:08:53,018 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:08:53,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53 WrapperNode [2023-11-29 04:08:53,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:08:53,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:08:53,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:08:53,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:08:53,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,052 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-29 04:08:53,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:08:53,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:08:53,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:08:53,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:08:53,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,066 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,082 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 04:08:53,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:08:53,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:08:53,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:08:53,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:08:53,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (1/1) ... [2023-11-29 04:08:53,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:08:53,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:53,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:08:53,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:08:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:08:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:08:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:08:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:08:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:08:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 04:08:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 04:08:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:08:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:08:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:08:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:08:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:08:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:08:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:08:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:08:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:08:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:08:53,177 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:08:53,304 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:08:53,307 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:08:53,489 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:08:53,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:08:53,652 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:08:53,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:08:53 BoogieIcfgContainer [2023-11-29 04:08:53,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:08:53,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:08:53,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:08:53,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:08:53,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:08:52" (1/3) ... [2023-11-29 04:08:53,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db3b8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:08:53, skipping insertion in model container [2023-11-29 04:08:53,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:08:53" (2/3) ... [2023-11-29 04:08:53,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db3b8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:08:53, skipping insertion in model container [2023-11-29 04:08:53,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:08:53" (3/3) ... [2023-11-29 04:08:53,661 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-11-29 04:08:53,668 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:08:53,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:08:53,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:08:53,676 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:08:53,718 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 04:08:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 75 flow [2023-11-29 04:08:53,780 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-29 04:08:53,780 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:08:53,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 3/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-29 04:08:53,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 75 flow [2023-11-29 04:08:53,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2023-11-29 04:08:53,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:08:53,803 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;@3ff3e4db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:08:53,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 04:08:53,848 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:08:53,848 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-29 04:08:53,848 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:08:53,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:53,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:53,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:53,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2051590417, now seen corresponding path program 1 times [2023-11-29 04:08:53,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:53,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461672417] [2023-11-29 04:08:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:53,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461672417] [2023-11-29 04:08:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461672417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:08:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:08:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:08:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352556624] [2023-11-29 04:08:54,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:08:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:08:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:08:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:08:54,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:08:54,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:08:54,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:08:54,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:08:54,640 INFO L124 PetriNetUnfolderBase]: 428/631 cut-off events. [2023-11-29 04:08:54,640 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-29 04:08:54,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 631 events. 428/631 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1994 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-29 04:08:54,650 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-11-29 04:08:54,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 199 flow [2023-11-29 04:08:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:08:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:08:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-29 04:08:54,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 04:08:54,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-29 04:08:54,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-29 04:08:54,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:08:54,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-29 04:08:54,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,671 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-29 04:08:54,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 199 flow [2023-11-29 04:08:54,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:08:54,678 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-11-29 04:08:54,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-29 04:08:54,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-29 04:08:54,683 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-11-29 04:08:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:54,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:54,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:08:54,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:54,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2074147469, now seen corresponding path program 1 times [2023-11-29 04:08:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:54,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682180443] [2023-11-29 04:08:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:54,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682180443] [2023-11-29 04:08:54,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682180443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:08:54,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:08:54,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:08:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084789115] [2023-11-29 04:08:54,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:08:54,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:08:54,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:54,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:08:54,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:08:54,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:08:54,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:54,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:08:54,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:08:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:08:55,249 INFO L124 PetriNetUnfolderBase]: 586/837 cut-off events. [2023-11-29 04:08:55,249 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-29 04:08:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 837 events. 586/837 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 231 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 597. Up to 620 conditions per place. [2023-11-29 04:08:55,259 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 49 selfloop transitions, 18 changer transitions 3/71 dead transitions. [2023-11-29 04:08:55,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 71 transitions, 355 flow [2023-11-29 04:08:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:08:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:08:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-29 04:08:55,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2023-11-29 04:08:55,262 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-29 04:08:55,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-29 04:08:55,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:08:55,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-29 04:08:55,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:55,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:55,265 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:55,266 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 89 transitions. [2023-11-29 04:08:55,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 71 transitions, 355 flow [2023-11-29 04:08:55,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:08:55,270 INFO L231 Difference]: Finished difference. Result has 36 places, 42 transitions, 202 flow [2023-11-29 04:08:55,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=36, PETRI_TRANSITIONS=42} [2023-11-29 04:08:55,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-29 04:08:55,271 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 42 transitions, 202 flow [2023-11-29 04:08:55,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:55,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:55,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:55,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:08:55,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:55,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1694506029, now seen corresponding path program 2 times [2023-11-29 04:08:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:55,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698976286] [2023-11-29 04:08:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698976286] [2023-11-29 04:08:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698976286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034143491] [2023-11-29 04:08:55,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:08:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:55,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:08:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:08:55,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:08:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:08:55,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:08:55,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:08:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:55,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:08:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034143491] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:56,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:08:56,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-11-29 04:08:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734667815] [2023-11-29 04:08:56,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:08:56,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:08:56,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:08:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:08:56,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:08:56,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 42 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:56,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:08:56,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:08:56,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:08:57,134 INFO L124 PetriNetUnfolderBase]: 953/1383 cut-off events. [2023-11-29 04:08:57,134 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2023-11-29 04:08:57,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1383 events. 953/1383 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5158 event pairs, 257 based on Foata normal form. 8/1391 useless extension candidates. Maximal degree in co-relation 2476. Up to 504 conditions per place. [2023-11-29 04:08:57,145 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 102 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2023-11-29 04:08:57,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 124 transitions, 748 flow [2023-11-29 04:08:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:08:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:08:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2023-11-29 04:08:57,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 04:08:57,148 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 135 transitions. [2023-11-29 04:08:57,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 135 transitions. [2023-11-29 04:08:57,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:08:57,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 135 transitions. [2023-11-29 04:08:57,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,152 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,152 INFO L175 Difference]: Start difference. First operand has 36 places, 42 transitions, 202 flow. Second operand 8 states and 135 transitions. [2023-11-29 04:08:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 124 transitions, 748 flow [2023-11-29 04:08:57,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 124 transitions, 726 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-11-29 04:08:57,161 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 335 flow [2023-11-29 04:08:57,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2023-11-29 04:08:57,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-11-29 04:08:57,162 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 335 flow [2023-11-29 04:08:57,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:57,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:57,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:08:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:57,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:57,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2068378681, now seen corresponding path program 3 times [2023-11-29 04:08:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:57,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574461210] [2023-11-29 04:08:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:57,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574461210] [2023-11-29 04:08:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574461210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:08:57,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:08:57,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:08:57,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611234811] [2023-11-29 04:08:57,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:08:57,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:08:57,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:08:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:08:57,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:08:57,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:08:57,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:08:57,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:08:57,940 INFO L124 PetriNetUnfolderBase]: 1156/1652 cut-off events. [2023-11-29 04:08:57,941 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2023-11-29 04:08:57,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 1652 events. 1156/1652 cut-off events. For 4319/4319 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6210 event pairs, 423 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 4247. Up to 1230 conditions per place. [2023-11-29 04:08:57,955 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 70 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-11-29 04:08:57,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 102 transitions, 790 flow [2023-11-29 04:08:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:08:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:08:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-29 04:08:57,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2023-11-29 04:08:57,957 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-29 04:08:57,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-29 04:08:57,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:08:57,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-29 04:08:57,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,959 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,959 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 335 flow. Second operand 7 states and 89 transitions. [2023-11-29 04:08:57,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 102 transitions, 790 flow [2023-11-29 04:08:57,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 102 transitions, 770 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-29 04:08:57,978 INFO L231 Difference]: Finished difference. Result has 56 places, 72 transitions, 533 flow [2023-11-29 04:08:57,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=56, PETRI_TRANSITIONS=72} [2023-11-29 04:08:57,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-11-29 04:08:57,979 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 72 transitions, 533 flow [2023-11-29 04:08:57,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:57,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:57,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:57,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:08:57,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:57,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash 107258399, now seen corresponding path program 4 times [2023-11-29 04:08:57,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:57,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879168231] [2023-11-29 04:08:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879168231] [2023-11-29 04:08:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879168231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461061522] [2023-11-29 04:08:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:08:58,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:58,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:08:58,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:08:58,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:08:58,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:08:58,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:08:58,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:08:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:58,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:08:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461061522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:08:58,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:08:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 04:08:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190150642] [2023-11-29 04:08:58,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:08:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:08:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:08:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:08:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:08:58,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:08:58,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 72 transitions, 533 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:58,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:08:58,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:08:58,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:08:59,490 INFO L124 PetriNetUnfolderBase]: 1347/2019 cut-off events. [2023-11-29 04:08:59,490 INFO L125 PetriNetUnfolderBase]: For 7445/7445 co-relation queries the response was YES. [2023-11-29 04:08:59,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 2019 events. 1347/2019 cut-off events. For 7445/7445 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8633 event pairs, 234 based on Foata normal form. 12/2031 useless extension candidates. Maximal degree in co-relation 5577. Up to 665 conditions per place. [2023-11-29 04:08:59,511 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 129 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2023-11-29 04:08:59,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 184 transitions, 1488 flow [2023-11-29 04:08:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:08:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:08:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2023-11-29 04:08:59,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 04:08:59,514 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 171 transitions. [2023-11-29 04:08:59,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 171 transitions. [2023-11-29 04:08:59,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:08:59,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 171 transitions. [2023-11-29 04:08:59,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:59,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:59,518 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:59,519 INFO L175 Difference]: Start difference. First operand has 56 places, 72 transitions, 533 flow. Second operand 12 states and 171 transitions. [2023-11-29 04:08:59,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 184 transitions, 1488 flow [2023-11-29 04:08:59,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 184 transitions, 1426 flow, removed 31 selfloop flow, removed 0 redundant places. [2023-11-29 04:08:59,547 INFO L231 Difference]: Finished difference. Result has 72 places, 97 transitions, 882 flow [2023-11-29 04:08:59,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=882, PETRI_PLACES=72, PETRI_TRANSITIONS=97} [2023-11-29 04:08:59,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-11-29 04:08:59,549 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 97 transitions, 882 flow [2023-11-29 04:08:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:08:59,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:08:59,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:08:59,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:08:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:59,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:08:59,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:08:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1799520576, now seen corresponding path program 1 times [2023-11-29 04:08:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:08:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485286323] [2023-11-29 04:08:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:08:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:08:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:08:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:08:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485286323] [2023-11-29 04:08:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485286323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:08:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116405627] [2023-11-29 04:08:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:08:59,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:08:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:08:59,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:08:59,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:09:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:00,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:09:00,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:00,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116405627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:00,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 04:09:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071089140] [2023-11-29 04:09:00,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:09:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:09:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:09:00,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 97 transitions, 882 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:01,529 INFO L124 PetriNetUnfolderBase]: 1466/2207 cut-off events. [2023-11-29 04:09:01,529 INFO L125 PetriNetUnfolderBase]: For 11047/11047 co-relation queries the response was YES. [2023-11-29 04:09:01,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10504 conditions, 2207 events. 1466/2207 cut-off events. For 11047/11047 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9783 event pairs, 338 based on Foata normal form. 18/2225 useless extension candidates. Maximal degree in co-relation 8117. Up to 817 conditions per place. [2023-11-29 04:09:01,556 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 135 selfloop transitions, 72 changer transitions 0/208 dead transitions. [2023-11-29 04:09:01,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 208 transitions, 1940 flow [2023-11-29 04:09:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:09:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:09:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2023-11-29 04:09:01,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401234567901234 [2023-11-29 04:09:01,558 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 175 transitions. [2023-11-29 04:09:01,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 175 transitions. [2023-11-29 04:09:01,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:01,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 175 transitions. [2023-11-29 04:09:01,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:01,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:01,561 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:01,561 INFO L175 Difference]: Start difference. First operand has 72 places, 97 transitions, 882 flow. Second operand 12 states and 175 transitions. [2023-11-29 04:09:01,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 208 transitions, 1940 flow [2023-11-29 04:09:01,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 208 transitions, 1901 flow, removed 19 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:01,600 INFO L231 Difference]: Finished difference. Result has 88 places, 123 transitions, 1317 flow [2023-11-29 04:09:01,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1317, PETRI_PLACES=88, PETRI_TRANSITIONS=123} [2023-11-29 04:09:01,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2023-11-29 04:09:01,601 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 123 transitions, 1317 flow [2023-11-29 04:09:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:01,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:01,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:09:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:01,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:01,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:01,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2091366796, now seen corresponding path program 2 times [2023-11-29 04:09:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:01,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873696128] [2023-11-29 04:09:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873696128] [2023-11-29 04:09:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873696128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59261808] [2023-11-29 04:09:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:09:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:01,986 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:09:02,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:02,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:02,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:02,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:02,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59261808] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:02,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:02,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-11-29 04:09:02,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578972687] [2023-11-29 04:09:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:02,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:02,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:02,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:02,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:09:02,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:02,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 123 transitions, 1317 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:02,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:02,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:02,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:02,954 INFO L124 PetriNetUnfolderBase]: 1628/2449 cut-off events. [2023-11-29 04:09:02,954 INFO L125 PetriNetUnfolderBase]: For 17051/17051 co-relation queries the response was YES. [2023-11-29 04:09:02,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12675 conditions, 2449 events. 1628/2449 cut-off events. For 17051/17051 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10981 event pairs, 336 based on Foata normal form. 4/2453 useless extension candidates. Maximal degree in co-relation 12032. Up to 826 conditions per place. [2023-11-29 04:09:02,977 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 164 selfloop transitions, 43 changer transitions 0/208 dead transitions. [2023-11-29 04:09:02,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 208 transitions, 2299 flow [2023-11-29 04:09:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:09:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:09:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2023-11-29 04:09:02,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 04:09:02,979 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 135 transitions. [2023-11-29 04:09:02,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 135 transitions. [2023-11-29 04:09:02,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:02,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 135 transitions. [2023-11-29 04:09:02,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:02,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:02,981 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:02,981 INFO L175 Difference]: Start difference. First operand has 88 places, 123 transitions, 1317 flow. Second operand 8 states and 135 transitions. [2023-11-29 04:09:02,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 208 transitions, 2299 flow [2023-11-29 04:09:03,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 208 transitions, 2250 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:03,027 INFO L231 Difference]: Finished difference. Result has 99 places, 138 transitions, 1609 flow [2023-11-29 04:09:03,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1609, PETRI_PLACES=99, PETRI_TRANSITIONS=138} [2023-11-29 04:09:03,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2023-11-29 04:09:03,028 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 138 transitions, 1609 flow [2023-11-29 04:09:03,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:03,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:03,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:03,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:09:03,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:03,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:03,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1936107039, now seen corresponding path program 5 times [2023-11-29 04:09:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615598954] [2023-11-29 04:09:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:03,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:03,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615598954] [2023-11-29 04:09:03,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615598954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:03,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002131003] [2023-11-29 04:09:03,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:09:03,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:03,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:03,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:09:03,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:03,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:03,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:03,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:03,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002131003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:03,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:03,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-29 04:09:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425660145] [2023-11-29 04:09:03,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:09:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:09:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:09:03,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:03,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 138 transitions, 1609 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:03,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:03,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:03,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:05,173 INFO L124 PetriNetUnfolderBase]: 2442/3689 cut-off events. [2023-11-29 04:09:05,173 INFO L125 PetriNetUnfolderBase]: For 34523/34523 co-relation queries the response was YES. [2023-11-29 04:09:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20726 conditions, 3689 events. 2442/3689 cut-off events. For 34523/34523 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18222 event pairs, 288 based on Foata normal form. 24/3713 useless extension candidates. Maximal degree in co-relation 19994. Up to 1308 conditions per place. [2023-11-29 04:09:05,204 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 200 selfloop transitions, 199 changer transitions 3/403 dead transitions. [2023-11-29 04:09:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 403 transitions, 4948 flow [2023-11-29 04:09:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:09:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:09:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 282 transitions. [2023-11-29 04:09:05,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2023-11-29 04:09:05,207 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 282 transitions. [2023-11-29 04:09:05,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 282 transitions. [2023-11-29 04:09:05,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:05,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 282 transitions. [2023-11-29 04:09:05,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:05,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:05,210 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:05,210 INFO L175 Difference]: Start difference. First operand has 99 places, 138 transitions, 1609 flow. Second operand 21 states and 282 transitions. [2023-11-29 04:09:05,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 403 transitions, 4948 flow [2023-11-29 04:09:05,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 403 transitions, 4856 flow, removed 46 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:05,377 INFO L231 Difference]: Finished difference. Result has 134 places, 271 transitions, 4004 flow [2023-11-29 04:09:05,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4004, PETRI_PLACES=134, PETRI_TRANSITIONS=271} [2023-11-29 04:09:05,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2023-11-29 04:09:05,378 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 271 transitions, 4004 flow [2023-11-29 04:09:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:05,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:05,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:09:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:05,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:05,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash 669564899, now seen corresponding path program 6 times [2023-11-29 04:09:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:05,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570662590] [2023-11-29 04:09:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:05,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570662590] [2023-11-29 04:09:05,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570662590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284699767] [2023-11-29 04:09:05,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:09:05,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:05,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:05,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:05,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:09:05,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:09:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:05,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:09:05,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:05,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284699767] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:06,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-29 04:09:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679646507] [2023-11-29 04:09:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:09:06,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:06,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 271 transitions, 4004 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:06,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:06,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:06,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:06,949 INFO L124 PetriNetUnfolderBase]: 2502/3781 cut-off events. [2023-11-29 04:09:06,949 INFO L125 PetriNetUnfolderBase]: For 59668/59668 co-relation queries the response was YES. [2023-11-29 04:09:06,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25876 conditions, 3781 events. 2502/3781 cut-off events. For 59668/59668 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18561 event pairs, 676 based on Foata normal form. 22/3803 useless extension candidates. Maximal degree in co-relation 24958. Up to 1754 conditions per place. [2023-11-29 04:09:06,979 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 259 selfloop transitions, 69 changer transitions 0/329 dead transitions. [2023-11-29 04:09:06,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 329 transitions, 5229 flow [2023-11-29 04:09:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:09:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:09:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2023-11-29 04:09:06,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2023-11-29 04:09:06,981 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 95 transitions. [2023-11-29 04:09:06,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 95 transitions. [2023-11-29 04:09:06,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:06,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 95 transitions. [2023-11-29 04:09:06,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:06,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:06,982 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:06,982 INFO L175 Difference]: Start difference. First operand has 134 places, 271 transitions, 4004 flow. Second operand 6 states and 95 transitions. [2023-11-29 04:09:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 329 transitions, 5229 flow [2023-11-29 04:09:07,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 329 transitions, 4858 flow, removed 167 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:07,196 INFO L231 Difference]: Finished difference. Result has 141 places, 283 transitions, 4088 flow [2023-11-29 04:09:07,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4088, PETRI_PLACES=141, PETRI_TRANSITIONS=283} [2023-11-29 04:09:07,197 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-11-29 04:09:07,197 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 283 transitions, 4088 flow [2023-11-29 04:09:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:07,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:07,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:07,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 04:09:07,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:07,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:07,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:07,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1289605321, now seen corresponding path program 7 times [2023-11-29 04:09:07,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:07,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141316407] [2023-11-29 04:09:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:07,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:07,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:07,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141316407] [2023-11-29 04:09:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141316407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:07,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506270205] [2023-11-29 04:09:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:09:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:07,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:07,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:09:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:07,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:07,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:07,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506270205] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:07,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:07,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-11-29 04:09:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702093715] [2023-11-29 04:09:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:09:07,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:07,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 283 transitions, 4088 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:07,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:07,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:07,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:08,787 INFO L124 PetriNetUnfolderBase]: 2712/4069 cut-off events. [2023-11-29 04:09:08,787 INFO L125 PetriNetUnfolderBase]: For 64836/64836 co-relation queries the response was YES. [2023-11-29 04:09:08,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27631 conditions, 4069 events. 2712/4069 cut-off events. For 64836/64836 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19998 event pairs, 646 based on Foata normal form. 22/4091 useless extension candidates. Maximal degree in co-relation 26836. Up to 1898 conditions per place. [2023-11-29 04:09:08,826 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 265 selfloop transitions, 91 changer transitions 0/357 dead transitions. [2023-11-29 04:09:08,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 357 transitions, 5598 flow [2023-11-29 04:09:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:09:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:09:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2023-11-29 04:09:08,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2023-11-29 04:09:08,827 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 95 transitions. [2023-11-29 04:09:08,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 95 transitions. [2023-11-29 04:09:08,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:08,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 95 transitions. [2023-11-29 04:09:08,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,829 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,829 INFO L175 Difference]: Start difference. First operand has 141 places, 283 transitions, 4088 flow. Second operand 6 states and 95 transitions. [2023-11-29 04:09:08,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 357 transitions, 5598 flow [2023-11-29 04:09:09,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 357 transitions, 5509 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:09,041 INFO L231 Difference]: Finished difference. Result has 149 places, 312 transitions, 4852 flow [2023-11-29 04:09:09,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4852, PETRI_PLACES=149, PETRI_TRANSITIONS=312} [2023-11-29 04:09:09,042 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2023-11-29 04:09:09,042 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 312 transitions, 4852 flow [2023-11-29 04:09:09,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:09,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:09,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:09:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:09,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:09,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1487861426, now seen corresponding path program 3 times [2023-11-29 04:09:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:09,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755200574] [2023-11-29 04:09:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:09,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:09,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:09,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755200574] [2023-11-29 04:09:09,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755200574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:09,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:09,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587476106] [2023-11-29 04:09:09,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:09,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:09,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 312 transitions, 4852 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:09,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:10,226 INFO L124 PetriNetUnfolderBase]: 2730/4095 cut-off events. [2023-11-29 04:09:10,226 INFO L125 PetriNetUnfolderBase]: For 81935/81935 co-relation queries the response was YES. [2023-11-29 04:09:10,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29669 conditions, 4095 events. 2730/4095 cut-off events. For 81935/81935 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20207 event pairs, 686 based on Foata normal form. 4/4099 useless extension candidates. Maximal degree in co-relation 28818. Up to 2468 conditions per place. [2023-11-29 04:09:10,261 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 257 selfloop transitions, 99 changer transitions 5/362 dead transitions. [2023-11-29 04:09:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 362 transitions, 5949 flow [2023-11-29 04:09:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2023-11-29 04:09:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-29 04:09:10,262 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 102 transitions. [2023-11-29 04:09:10,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 102 transitions. [2023-11-29 04:09:10,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:10,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 102 transitions. [2023-11-29 04:09:10,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,264 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,264 INFO L175 Difference]: Start difference. First operand has 149 places, 312 transitions, 4852 flow. Second operand 7 states and 102 transitions. [2023-11-29 04:09:10,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 362 transitions, 5949 flow [2023-11-29 04:09:10,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 362 transitions, 5820 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:10,619 INFO L231 Difference]: Finished difference. Result has 156 places, 316 transitions, 4994 flow [2023-11-29 04:09:10,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4994, PETRI_PLACES=156, PETRI_TRANSITIONS=316} [2023-11-29 04:09:10,620 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2023-11-29 04:09:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 316 transitions, 4994 flow [2023-11-29 04:09:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:10,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 04:09:10,620 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:10,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1367348048, now seen corresponding path program 4 times [2023-11-29 04:09:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:10,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275330386] [2023-11-29 04:09:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275330386] [2023-11-29 04:09:10,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275330386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:10,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:10,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:10,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666629318] [2023-11-29 04:09:10,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:10,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:10,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:10,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:10,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:10,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 316 transitions, 4994 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:10,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:10,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:11,854 INFO L124 PetriNetUnfolderBase]: 2870/4341 cut-off events. [2023-11-29 04:09:11,854 INFO L125 PetriNetUnfolderBase]: For 82451/82451 co-relation queries the response was YES. [2023-11-29 04:09:11,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31235 conditions, 4341 events. 2870/4341 cut-off events. For 82451/82451 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22028 event pairs, 672 based on Foata normal form. 24/4365 useless extension candidates. Maximal degree in co-relation 30330. Up to 2468 conditions per place. [2023-11-29 04:09:11,891 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 273 selfloop transitions, 102 changer transitions 8/384 dead transitions. [2023-11-29 04:09:11,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 384 transitions, 6346 flow [2023-11-29 04:09:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2023-11-29 04:09:11,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 04:09:11,893 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2023-11-29 04:09:11,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2023-11-29 04:09:11,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:11,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2023-11-29 04:09:11,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,894 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,894 INFO L175 Difference]: Start difference. First operand has 156 places, 316 transitions, 4994 flow. Second operand 7 states and 105 transitions. [2023-11-29 04:09:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 384 transitions, 6346 flow [2023-11-29 04:09:12,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 384 transitions, 6136 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-29 04:09:12,264 INFO L231 Difference]: Finished difference. Result has 162 places, 326 transitions, 5243 flow [2023-11-29 04:09:12,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=162, PETRI_TRANSITIONS=326} [2023-11-29 04:09:12,265 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-11-29 04:09:12,265 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 326 transitions, 5243 flow [2023-11-29 04:09:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:12,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:12,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 04:09:12,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:12,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 306307073, now seen corresponding path program 8 times [2023-11-29 04:09:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598671555] [2023-11-29 04:09:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:12,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:12,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598671555] [2023-11-29 04:09:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598671555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:12,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135714713] [2023-11-29 04:09:12,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:09:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:12,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:09:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:12,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:09:12,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:12,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:12,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135714713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:12,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:12,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 16 [2023-11-29 04:09:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966793001] [2023-11-29 04:09:12,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:09:12,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:12,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 326 transitions, 5243 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:12,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:12,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:13,916 INFO L124 PetriNetUnfolderBase]: 2984/4590 cut-off events. [2023-11-29 04:09:13,916 INFO L125 PetriNetUnfolderBase]: For 80550/80550 co-relation queries the response was YES. [2023-11-29 04:09:13,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32747 conditions, 4590 events. 2984/4590 cut-off events. For 80550/80550 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24182 event pairs, 555 based on Foata normal form. 18/4608 useless extension candidates. Maximal degree in co-relation 32008. Up to 1611 conditions per place. [2023-11-29 04:09:13,956 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 284 selfloop transitions, 142 changer transitions 0/427 dead transitions. [2023-11-29 04:09:13,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 427 transitions, 7055 flow [2023-11-29 04:09:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:09:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:09:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2023-11-29 04:09:13,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2023-11-29 04:09:13,958 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 137 transitions. [2023-11-29 04:09:13,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 137 transitions. [2023-11-29 04:09:13,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:13,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 137 transitions. [2023-11-29 04:09:13,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:13,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:13,959 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:13,960 INFO L175 Difference]: Start difference. First operand has 162 places, 326 transitions, 5243 flow. Second operand 8 states and 137 transitions. [2023-11-29 04:09:13,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 427 transitions, 7055 flow [2023-11-29 04:09:14,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 427 transitions, 6889 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 04:09:14,351 INFO L231 Difference]: Finished difference. Result has 168 places, 345 transitions, 5885 flow [2023-11-29 04:09:14,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5077, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5885, PETRI_PLACES=168, PETRI_TRANSITIONS=345} [2023-11-29 04:09:14,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2023-11-29 04:09:14,352 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 345 transitions, 5885 flow [2023-11-29 04:09:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:14,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:14,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:09:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:14,553 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:14,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -229955159, now seen corresponding path program 9 times [2023-11-29 04:09:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:14,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049675181] [2023-11-29 04:09:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049675181] [2023-11-29 04:09:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049675181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572220449] [2023-11-29 04:09:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:09:14,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:14,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:14,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:14,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:09:14,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:09:14,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:14,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:09:14,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:15,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572220449] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:15,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:15,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2023-11-29 04:09:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300640715] [2023-11-29 04:09:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:15,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:09:15,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:15,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 345 transitions, 5885 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:15,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:15,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:15,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:16,279 INFO L124 PetriNetUnfolderBase]: 3008/4632 cut-off events. [2023-11-29 04:09:16,280 INFO L125 PetriNetUnfolderBase]: For 89416/89416 co-relation queries the response was YES. [2023-11-29 04:09:16,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33847 conditions, 4632 events. 3008/4632 cut-off events. For 89416/89416 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24370 event pairs, 751 based on Foata normal form. 18/4650 useless extension candidates. Maximal degree in co-relation 33378. Up to 2300 conditions per place. [2023-11-29 04:09:16,321 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 310 selfloop transitions, 84 changer transitions 0/395 dead transitions. [2023-11-29 04:09:16,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 395 transitions, 7095 flow [2023-11-29 04:09:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:09:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:09:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-29 04:09:16,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2023-11-29 04:09:16,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-29 04:09:16,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-29 04:09:16,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:16,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-29 04:09:16,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,324 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,325 INFO L175 Difference]: Start difference. First operand has 168 places, 345 transitions, 5885 flow. Second operand 6 states and 93 transitions. [2023-11-29 04:09:16,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 395 transitions, 7095 flow [2023-11-29 04:09:16,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 395 transitions, 6897 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 04:09:16,692 INFO L231 Difference]: Finished difference. Result has 170 places, 349 transitions, 5944 flow [2023-11-29 04:09:16,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5687, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5944, PETRI_PLACES=170, PETRI_TRANSITIONS=349} [2023-11-29 04:09:16,693 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2023-11-29 04:09:16,693 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 349 transitions, 5944 flow [2023-11-29 04:09:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:16,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:16,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:09:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:09:16,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:16,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1969199872, now seen corresponding path program 5 times [2023-11-29 04:09:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:16,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032787869] [2023-11-29 04:09:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032787869] [2023-11-29 04:09:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032787869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325030182] [2023-11-29 04:09:17,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:09:17,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:17,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:09:17,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:17,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:17,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:17,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:17,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325030182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:17,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:17,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-29 04:09:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071338956] [2023-11-29 04:09:17,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:09:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:09:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:09:17,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:17,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 349 transitions, 5944 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:17,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:17,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:17,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:19,473 INFO L124 PetriNetUnfolderBase]: 4301/6560 cut-off events. [2023-11-29 04:09:19,473 INFO L125 PetriNetUnfolderBase]: For 138906/138906 co-relation queries the response was YES. [2023-11-29 04:09:19,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48125 conditions, 6560 events. 4301/6560 cut-off events. For 138906/138906 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36631 event pairs, 788 based on Foata normal form. 46/6606 useless extension candidates. Maximal degree in co-relation 47314. Up to 2694 conditions per place. [2023-11-29 04:09:19,542 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 482 selfloop transitions, 167 changer transitions 0/650 dead transitions. [2023-11-29 04:09:19,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 650 transitions, 11148 flow [2023-11-29 04:09:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:09:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:09:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 275 transitions. [2023-11-29 04:09:19,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48500881834215165 [2023-11-29 04:09:19,545 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 275 transitions. [2023-11-29 04:09:19,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 275 transitions. [2023-11-29 04:09:19,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:19,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 275 transitions. [2023-11-29 04:09:19,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.095238095238095) internal successors, (275), 21 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:19,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:19,548 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:19,549 INFO L175 Difference]: Start difference. First operand has 170 places, 349 transitions, 5944 flow. Second operand 21 states and 275 transitions. [2023-11-29 04:09:19,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 650 transitions, 11148 flow [2023-11-29 04:09:20,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 650 transitions, 10840 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-11-29 04:09:20,158 INFO L231 Difference]: Finished difference. Result has 200 places, 411 transitions, 7306 flow [2023-11-29 04:09:20,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7306, PETRI_PLACES=200, PETRI_TRANSITIONS=411} [2023-11-29 04:09:20,159 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-11-29 04:09:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 411 transitions, 7306 flow [2023-11-29 04:09:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:20,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:20,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:20,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:09:20,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:09:20,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -34440515, now seen corresponding path program 10 times [2023-11-29 04:09:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497375740] [2023-11-29 04:09:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497375740] [2023-11-29 04:09:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497375740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732755879] [2023-11-29 04:09:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:09:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:20,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:20,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:09:20,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:09:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:20,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:09:20,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:20,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732755879] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:09:20,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2023-11-29 04:09:20,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302457382] [2023-11-29 04:09:20,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:20,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:09:20,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:09:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:09:20,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:20,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 411 transitions, 7306 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:20,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:20,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:20,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:22,253 INFO L124 PetriNetUnfolderBase]: 4262/6446 cut-off events. [2023-11-29 04:09:22,253 INFO L125 PetriNetUnfolderBase]: For 163047/163047 co-relation queries the response was YES. [2023-11-29 04:09:22,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52737 conditions, 6446 events. 4262/6446 cut-off events. For 163047/163047 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35301 event pairs, 920 based on Foata normal form. 28/6474 useless extension candidates. Maximal degree in co-relation 52364. Up to 3566 conditions per place. [2023-11-29 04:09:22,330 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 337 selfloop transitions, 125 changer transitions 0/463 dead transitions. [2023-11-29 04:09:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 463 transitions, 8716 flow [2023-11-29 04:09:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:09:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:09:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-29 04:09:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2023-11-29 04:09:22,332 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-29 04:09:22,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-29 04:09:22,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:22,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-29 04:09:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:22,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:22,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:22,333 INFO L175 Difference]: Start difference. First operand has 200 places, 411 transitions, 7306 flow. Second operand 6 states and 93 transitions. [2023-11-29 04:09:22,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 463 transitions, 8716 flow [2023-11-29 04:09:23,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 463 transitions, 8493 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-11-29 04:09:23,181 INFO L231 Difference]: Finished difference. Result has 204 places, 411 transitions, 7368 flow [2023-11-29 04:09:23,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7368, PETRI_PLACES=204, PETRI_TRANSITIONS=411} [2023-11-29 04:09:23,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-11-29 04:09:23,182 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 411 transitions, 7368 flow [2023-11-29 04:09:23,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:23,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:23,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:23,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 04:09:23,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:09:23,382 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:23,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:23,383 INFO L85 PathProgramCache]: Analyzing trace with hash 737638937, now seen corresponding path program 1 times [2023-11-29 04:09:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:23,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861633499] [2023-11-29 04:09:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:23,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:23,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:23,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861633499] [2023-11-29 04:09:23,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861633499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:23,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:23,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:23,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71195718] [2023-11-29 04:09:23,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:23,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:23,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:23,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:23,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 411 transitions, 7368 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:23,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:23,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:23,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:25,133 INFO L124 PetriNetUnfolderBase]: 4274/6497 cut-off events. [2023-11-29 04:09:25,133 INFO L125 PetriNetUnfolderBase]: For 173756/173756 co-relation queries the response was YES. [2023-11-29 04:09:25,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53051 conditions, 6497 events. 4274/6497 cut-off events. For 173756/173756 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35937 event pairs, 1262 based on Foata normal form. 24/6521 useless extension candidates. Maximal degree in co-relation 52673. Up to 4544 conditions per place. [2023-11-29 04:09:25,209 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 344 selfloop transitions, 98 changer transitions 19/462 dead transitions. [2023-11-29 04:09:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 462 transitions, 8695 flow [2023-11-29 04:09:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2023-11-29 04:09:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2023-11-29 04:09:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2023-11-29 04:09:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2023-11-29 04:09:25,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:25,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2023-11-29 04:09:25,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:25,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:25,212 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:25,212 INFO L175 Difference]: Start difference. First operand has 204 places, 411 transitions, 7368 flow. Second operand 7 states and 107 transitions. [2023-11-29 04:09:25,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 462 transitions, 8695 flow [2023-11-29 04:09:25,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 462 transitions, 8557 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 04:09:25,962 INFO L231 Difference]: Finished difference. Result has 209 places, 408 transitions, 7389 flow [2023-11-29 04:09:25,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7389, PETRI_PLACES=209, PETRI_TRANSITIONS=408} [2023-11-29 04:09:25,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2023-11-29 04:09:25,963 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 408 transitions, 7389 flow [2023-11-29 04:09:25,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:25,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:25,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:25,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 04:09:25,964 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:25,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1267810233, now seen corresponding path program 11 times [2023-11-29 04:09:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:25,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258528183] [2023-11-29 04:09:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:26,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258528183] [2023-11-29 04:09:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258528183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889071540] [2023-11-29 04:09:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:09:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:26,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:09:26,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:26,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:26,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:26,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:26,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889071540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:27,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-29 04:09:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378568394] [2023-11-29 04:09:27,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:09:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:09:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:09:27,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:27,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 408 transitions, 7389 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:27,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:27,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:27,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:30,516 INFO L124 PetriNetUnfolderBase]: 6468/9762 cut-off events. [2023-11-29 04:09:30,516 INFO L125 PetriNetUnfolderBase]: For 256085/256085 co-relation queries the response was YES. [2023-11-29 04:09:30,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80894 conditions, 9762 events. 6468/9762 cut-off events. For 256085/256085 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 57437 event pairs, 1008 based on Foata normal form. 62/9824 useless extension candidates. Maximal degree in co-relation 80550. Up to 4467 conditions per place. [2023-11-29 04:09:30,630 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 419 selfloop transitions, 477 changer transitions 0/897 dead transitions. [2023-11-29 04:09:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 897 transitions, 16803 flow [2023-11-29 04:09:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:09:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 04:09:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 365 transitions. [2023-11-29 04:09:30,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006858710562414 [2023-11-29 04:09:30,632 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 365 transitions. [2023-11-29 04:09:30,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 365 transitions. [2023-11-29 04:09:30,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:30,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 365 transitions. [2023-11-29 04:09:30,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 13.518518518518519) internal successors, (365), 27 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:30,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 27.0) internal successors, (756), 28 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:30,636 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 27.0) internal successors, (756), 28 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:30,636 INFO L175 Difference]: Start difference. First operand has 209 places, 408 transitions, 7389 flow. Second operand 27 states and 365 transitions. [2023-11-29 04:09:30,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 897 transitions, 16803 flow [2023-11-29 04:09:32,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 897 transitions, 16577 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-29 04:09:32,015 INFO L231 Difference]: Finished difference. Result has 240 places, 675 transitions, 14096 flow [2023-11-29 04:09:32,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14096, PETRI_PLACES=240, PETRI_TRANSITIONS=675} [2023-11-29 04:09:32,016 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2023-11-29 04:09:32,016 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 675 transitions, 14096 flow [2023-11-29 04:09:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:32,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:32,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:32,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:09:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:09:32,217 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1429054699, now seen corresponding path program 2 times [2023-11-29 04:09:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850419137] [2023-11-29 04:09:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:32,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:32,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850419137] [2023-11-29 04:09:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850419137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950923101] [2023-11-29 04:09:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:32,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:32,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 675 transitions, 14096 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:32,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:32,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:32,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:34,995 INFO L124 PetriNetUnfolderBase]: 6488/9851 cut-off events. [2023-11-29 04:09:34,995 INFO L125 PetriNetUnfolderBase]: For 317009/317009 co-relation queries the response was YES. [2023-11-29 04:09:35,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90587 conditions, 9851 events. 6488/9851 cut-off events. For 317009/317009 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 58366 event pairs, 1814 based on Foata normal form. 36/9887 useless extension candidates. Maximal degree in co-relation 90141. Up to 9027 conditions per place. [2023-11-29 04:09:35,139 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 596 selfloop transitions, 111 changer transitions 10/718 dead transitions. [2023-11-29 04:09:35,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 718 transitions, 15881 flow [2023-11-29 04:09:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2023-11-29 04:09:35,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2023-11-29 04:09:35,140 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 101 transitions. [2023-11-29 04:09:35,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 101 transitions. [2023-11-29 04:09:35,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:35,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 101 transitions. [2023-11-29 04:09:35,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:35,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:35,142 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:35,142 INFO L175 Difference]: Start difference. First operand has 240 places, 675 transitions, 14096 flow. Second operand 7 states and 101 transitions. [2023-11-29 04:09:35,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 718 transitions, 15881 flow [2023-11-29 04:09:37,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 718 transitions, 14900 flow, removed 373 selfloop flow, removed 4 redundant places. [2023-11-29 04:09:37,787 INFO L231 Difference]: Finished difference. Result has 245 places, 676 transitions, 13385 flow [2023-11-29 04:09:37,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13119, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13385, PETRI_PLACES=245, PETRI_TRANSITIONS=676} [2023-11-29 04:09:37,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2023-11-29 04:09:37,788 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 676 transitions, 13385 flow [2023-11-29 04:09:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:37,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:37,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 04:09:37,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:37,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:37,789 INFO L85 PathProgramCache]: Analyzing trace with hash -973589241, now seen corresponding path program 12 times [2023-11-29 04:09:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:37,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853352532] [2023-11-29 04:09:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853352532] [2023-11-29 04:09:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853352532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:37,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:37,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175790102] [2023-11-29 04:09:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:37,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:37,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 676 transitions, 13385 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:37,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:37,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:40,921 INFO L124 PetriNetUnfolderBase]: 6492/9836 cut-off events. [2023-11-29 04:09:40,922 INFO L125 PetriNetUnfolderBase]: For 295714/295714 co-relation queries the response was YES. [2023-11-29 04:09:41,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86509 conditions, 9836 events. 6492/9836 cut-off events. For 295714/295714 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 57919 event pairs, 1851 based on Foata normal form. 16/9852 useless extension candidates. Maximal degree in co-relation 86134. Up to 9190 conditions per place. [2023-11-29 04:09:41,112 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 586 selfloop transitions, 127 changer transitions 0/714 dead transitions. [2023-11-29 04:09:41,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 714 transitions, 15248 flow [2023-11-29 04:09:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2023-11-29 04:09:41,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2023-11-29 04:09:41,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 92 transitions. [2023-11-29 04:09:41,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 92 transitions. [2023-11-29 04:09:41,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:41,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 92 transitions. [2023-11-29 04:09:41,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:41,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:41,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:41,115 INFO L175 Difference]: Start difference. First operand has 245 places, 676 transitions, 13385 flow. Second operand 7 states and 92 transitions. [2023-11-29 04:09:41,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 714 transitions, 15248 flow [2023-11-29 04:09:42,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 714 transitions, 15003 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-29 04:09:42,872 INFO L231 Difference]: Finished difference. Result has 249 places, 689 transitions, 13701 flow [2023-11-29 04:09:42,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13155, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13701, PETRI_PLACES=249, PETRI_TRANSITIONS=689} [2023-11-29 04:09:42,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2023-11-29 04:09:42,873 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 689 transitions, 13701 flow [2023-11-29 04:09:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:42,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:42,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:42,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 04:09:42,874 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:42,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 640424169, now seen corresponding path program 3 times [2023-11-29 04:09:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:42,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628090249] [2023-11-29 04:09:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:43,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:43,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628090249] [2023-11-29 04:09:43,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628090249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:43,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664266918] [2023-11-29 04:09:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:09:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:43,014 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:09:43,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:09:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:43,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:09:43,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:43,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664266918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:43,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:43,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-29 04:09:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960210360] [2023-11-29 04:09:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:09:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:09:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:09:43,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:43,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 689 transitions, 13701 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:43,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:43,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:43,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:46,899 INFO L124 PetriNetUnfolderBase]: 6593/9998 cut-off events. [2023-11-29 04:09:46,899 INFO L125 PetriNetUnfolderBase]: For 303529/303529 co-relation queries the response was YES. [2023-11-29 04:09:46,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88565 conditions, 9998 events. 6593/9998 cut-off events. For 303529/303529 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 59256 event pairs, 1810 based on Foata normal form. 28/10026 useless extension candidates. Maximal degree in co-relation 88114. Up to 9181 conditions per place. [2023-11-29 04:09:47,019 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 620 selfloop transitions, 139 changer transitions 0/760 dead transitions. [2023-11-29 04:09:47,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 760 transitions, 15909 flow [2023-11-29 04:09:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:09:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:09:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2023-11-29 04:09:47,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-11-29 04:09:47,020 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 152 transitions. [2023-11-29 04:09:47,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 152 transitions. [2023-11-29 04:09:47,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:47,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 152 transitions. [2023-11-29 04:09:47,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,022 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,022 INFO L175 Difference]: Start difference. First operand has 249 places, 689 transitions, 13701 flow. Second operand 12 states and 152 transitions. [2023-11-29 04:09:47,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 760 transitions, 15909 flow [2023-11-29 04:09:48,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 760 transitions, 15686 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 04:09:48,851 INFO L231 Difference]: Finished difference. Result has 263 places, 708 transitions, 14162 flow [2023-11-29 04:09:48,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13480, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14162, PETRI_PLACES=263, PETRI_TRANSITIONS=708} [2023-11-29 04:09:48,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2023-11-29 04:09:48,852 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 708 transitions, 14162 flow [2023-11-29 04:09:48,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:48,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:48,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:48,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:09:49,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:49,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:49,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 89457081, now seen corresponding path program 13 times [2023-11-29 04:09:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:49,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714021055] [2023-11-29 04:09:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:49,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714021055] [2023-11-29 04:09:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714021055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880073025] [2023-11-29 04:09:49,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:49,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:49,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 708 transitions, 14162 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:49,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:49,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:49,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:52,376 INFO L124 PetriNetUnfolderBase]: 6599/10008 cut-off events. [2023-11-29 04:09:52,377 INFO L125 PetriNetUnfolderBase]: For 336534/336534 co-relation queries the response was YES. [2023-11-29 04:09:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90830 conditions, 10008 events. 6599/10008 cut-off events. For 336534/336534 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 59284 event pairs, 1886 based on Foata normal form. 2/10010 useless extension candidates. Maximal degree in co-relation 90374. Up to 9377 conditions per place. [2023-11-29 04:09:52,502 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 607 selfloop transitions, 126 changer transitions 2/736 dead transitions. [2023-11-29 04:09:52,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 736 transitions, 15916 flow [2023-11-29 04:09:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-29 04:09:52,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 04:09:52,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-29 04:09:52,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-29 04:09:52,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:52,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-29 04:09:52,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:52,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:52,504 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:52,504 INFO L175 Difference]: Start difference. First operand has 263 places, 708 transitions, 14162 flow. Second operand 7 states and 84 transitions. [2023-11-29 04:09:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 736 transitions, 15916 flow [2023-11-29 04:09:54,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 736 transitions, 15567 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-11-29 04:09:54,523 INFO L231 Difference]: Finished difference. Result has 268 places, 712 transitions, 14180 flow [2023-11-29 04:09:54,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13826, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14180, PETRI_PLACES=268, PETRI_TRANSITIONS=712} [2023-11-29 04:09:54,524 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2023-11-29 04:09:54,524 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 712 transitions, 14180 flow [2023-11-29 04:09:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:54,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:54,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 04:09:54,524 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:09:54,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash -24646319, now seen corresponding path program 4 times [2023-11-29 04:09:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236872113] [2023-11-29 04:09:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:54,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236872113] [2023-11-29 04:09:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236872113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:09:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912892784] [2023-11-29 04:09:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:09:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:09:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:09:54,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:09:54,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 712 transitions, 14180 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:54,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:54,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:09:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:57,947 INFO L124 PetriNetUnfolderBase]: 6615/10070 cut-off events. [2023-11-29 04:09:57,947 INFO L125 PetriNetUnfolderBase]: For 336749/336749 co-relation queries the response was YES. [2023-11-29 04:09:58,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91140 conditions, 10070 events. 6615/10070 cut-off events. For 336749/336749 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 60077 event pairs, 1890 based on Foata normal form. 24/10094 useless extension candidates. Maximal degree in co-relation 90681. Up to 9359 conditions per place. [2023-11-29 04:09:58,073 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 627 selfloop transitions, 112 changer transitions 13/753 dead transitions. [2023-11-29 04:09:58,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 753 transitions, 16078 flow [2023-11-29 04:09:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:09:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:09:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2023-11-29 04:09:58,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-29 04:09:58,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 99 transitions. [2023-11-29 04:09:58,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 99 transitions. [2023-11-29 04:09:58,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:58,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 99 transitions. [2023-11-29 04:09:58,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:58,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:58,076 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:58,076 INFO L175 Difference]: Start difference. First operand has 268 places, 712 transitions, 14180 flow. Second operand 7 states and 99 transitions. [2023-11-29 04:09:58,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 753 transitions, 16078 flow [2023-11-29 04:10:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 753 transitions, 15842 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 04:10:00,116 INFO L231 Difference]: Finished difference. Result has 272 places, 708 transitions, 14104 flow [2023-11-29 04:10:00,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13950, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14104, PETRI_PLACES=272, PETRI_TRANSITIONS=708} [2023-11-29 04:10:00,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2023-11-29 04:10:00,117 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 708 transitions, 14104 flow [2023-11-29 04:10:00,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:00,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:00,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:00,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 04:10:00,118 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:00,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2071778992, now seen corresponding path program 6 times [2023-11-29 04:10:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223112930] [2023-11-29 04:10:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:00,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:00,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:00,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223112930] [2023-11-29 04:10:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223112930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:00,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107969166] [2023-11-29 04:10:00,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:10:00,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:00,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:00,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:10:00,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:10:00,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:10:00,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:10:00,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:00,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:00,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107969166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:00,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:00,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-29 04:10:00,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676400834] [2023-11-29 04:10:00,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:00,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:10:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:00,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:10:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:10:00,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:00,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 708 transitions, 14104 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:00,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:00,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:00,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:05,424 INFO L124 PetriNetUnfolderBase]: 7714/11753 cut-off events. [2023-11-29 04:10:05,424 INFO L125 PetriNetUnfolderBase]: For 392762/392762 co-relation queries the response was YES. [2023-11-29 04:10:05,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105900 conditions, 11753 events. 7714/11753 cut-off events. For 392762/392762 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 72569 event pairs, 1221 based on Foata normal form. 26/11779 useless extension candidates. Maximal degree in co-relation 105695. Up to 5086 conditions per place. [2023-11-29 04:10:05,607 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 579 selfloop transitions, 514 changer transitions 0/1094 dead transitions. [2023-11-29 04:10:05,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1094 transitions, 22737 flow [2023-11-29 04:10:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 04:10:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 04:10:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 389 transitions. [2023-11-29 04:10:05,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145502645502645 [2023-11-29 04:10:05,609 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 389 transitions. [2023-11-29 04:10:05,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 389 transitions. [2023-11-29 04:10:05,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:05,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 389 transitions. [2023-11-29 04:10:05,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 13.892857142857142) internal successors, (389), 28 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:05,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 27.0) internal successors, (783), 29 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:05,613 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 27.0) internal successors, (783), 29 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:05,613 INFO L175 Difference]: Start difference. First operand has 272 places, 708 transitions, 14104 flow. Second operand 28 states and 389 transitions. [2023-11-29 04:10:05,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1094 transitions, 22737 flow [2023-11-29 04:10:08,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1094 transitions, 22488 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 04:10:08,476 INFO L231 Difference]: Finished difference. Result has 311 places, 846 transitions, 18975 flow [2023-11-29 04:10:08,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13875, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18975, PETRI_PLACES=311, PETRI_TRANSITIONS=846} [2023-11-29 04:10:08,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2023-11-29 04:10:08,478 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 846 transitions, 18975 flow [2023-11-29 04:10:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:08,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:08,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:08,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:10:08,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:10:08,678 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:08,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1552968377, now seen corresponding path program 14 times [2023-11-29 04:10:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960603490] [2023-11-29 04:10:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:08,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960603490] [2023-11-29 04:10:08,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960603490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407807238] [2023-11-29 04:10:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:10:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:08,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:08,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:10:08,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:10:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:10:08,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:10:08,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:09,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407807238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:09,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2023-11-29 04:10:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856336044] [2023-11-29 04:10:09,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:10:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:10:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:10:09,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:09,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 846 transitions, 18975 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:09,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:09,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:09,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:13,554 INFO L124 PetriNetUnfolderBase]: 7888/12004 cut-off events. [2023-11-29 04:10:13,554 INFO L125 PetriNetUnfolderBase]: For 464679/464679 co-relation queries the response was YES. [2023-11-29 04:10:13,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116537 conditions, 12004 events. 7888/12004 cut-off events. For 464679/464679 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 74110 event pairs, 1747 based on Foata normal form. 28/12032 useless extension candidates. Maximal degree in co-relation 116004. Up to 9680 conditions per place. [2023-11-29 04:10:13,745 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 641 selfloop transitions, 381 changer transitions 0/1023 dead transitions. [2023-11-29 04:10:13,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1023 transitions, 23859 flow [2023-11-29 04:10:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:10:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 04:10:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 184 transitions. [2023-11-29 04:10:13,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2023-11-29 04:10:13,746 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 184 transitions. [2023-11-29 04:10:13,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 184 transitions. [2023-11-29 04:10:13,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:13,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 184 transitions. [2023-11-29 04:10:13,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.142857142857142) internal successors, (184), 14 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:13,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:13,748 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:13,748 INFO L175 Difference]: Start difference. First operand has 311 places, 846 transitions, 18975 flow. Second operand 14 states and 184 transitions. [2023-11-29 04:10:13,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1023 transitions, 23859 flow [2023-11-29 04:10:17,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1023 transitions, 23589 flow, removed 105 selfloop flow, removed 4 redundant places. [2023-11-29 04:10:17,104 INFO L231 Difference]: Finished difference. Result has 327 places, 916 transitions, 21270 flow [2023-11-29 04:10:17,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18705, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21270, PETRI_PLACES=327, PETRI_TRANSITIONS=916} [2023-11-29 04:10:17,105 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2023-11-29 04:10:17,106 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 916 transitions, 21270 flow [2023-11-29 04:10:17,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:17,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:17,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:17,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:10:17,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:10:17,306 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:17,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 212005311, now seen corresponding path program 15 times [2023-11-29 04:10:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104456220] [2023-11-29 04:10:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:17,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:17,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104456220] [2023-11-29 04:10:17,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104456220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:17,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146879548] [2023-11-29 04:10:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:10:17,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:17,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:17,433 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:17,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:10:17,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:10:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:10:17,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:10:17,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:17,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:17,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146879548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:17,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:17,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-29 04:10:17,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342256897] [2023-11-29 04:10:17,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:17,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:10:17,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:10:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:10:17,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 916 transitions, 21270 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:17,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:17,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:22,785 INFO L124 PetriNetUnfolderBase]: 7808/11851 cut-off events. [2023-11-29 04:10:22,785 INFO L125 PetriNetUnfolderBase]: For 476693/476693 co-relation queries the response was YES. [2023-11-29 04:10:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117817 conditions, 11851 events. 7808/11851 cut-off events. For 476693/476693 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 72760 event pairs, 1644 based on Foata normal form. 72/11923 useless extension candidates. Maximal degree in co-relation 117276. Up to 9235 conditions per place. [2023-11-29 04:10:22,997 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 673 selfloop transitions, 404 changer transitions 0/1078 dead transitions. [2023-11-29 04:10:22,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1078 transitions, 25466 flow [2023-11-29 04:10:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:10:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 04:10:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 259 transitions. [2023-11-29 04:10:22,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048732943469786 [2023-11-29 04:10:22,999 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 259 transitions. [2023-11-29 04:10:22,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 259 transitions. [2023-11-29 04:10:22,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:23,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 259 transitions. [2023-11-29 04:10:23,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 13.631578947368421) internal successors, (259), 19 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:23,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 27.0) internal successors, (540), 20 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:23,002 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 27.0) internal successors, (540), 20 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:23,002 INFO L175 Difference]: Start difference. First operand has 327 places, 916 transitions, 21270 flow. Second operand 19 states and 259 transitions. [2023-11-29 04:10:23,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1078 transitions, 25466 flow [2023-11-29 04:10:26,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1078 transitions, 25082 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-11-29 04:10:26,760 INFO L231 Difference]: Finished difference. Result has 347 places, 937 transitions, 22275 flow [2023-11-29 04:10:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20918, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=22275, PETRI_PLACES=347, PETRI_TRANSITIONS=937} [2023-11-29 04:10:26,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2023-11-29 04:10:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 937 transitions, 22275 flow [2023-11-29 04:10:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:26,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:26,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:26,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 04:10:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:10:26,962 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:26,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -337122387, now seen corresponding path program 16 times [2023-11-29 04:10:26,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:26,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090296968] [2023-11-29 04:10:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:27,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090296968] [2023-11-29 04:10:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090296968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:10:27,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:10:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:10:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49649075] [2023-11-29 04:10:27,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:10:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:10:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:10:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:10:27,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:27,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 937 transitions, 22275 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:27,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:27,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:27,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:31,622 INFO L124 PetriNetUnfolderBase]: 7828/11887 cut-off events. [2023-11-29 04:10:31,622 INFO L125 PetriNetUnfolderBase]: For 483278/483278 co-relation queries the response was YES. [2023-11-29 04:10:31,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120987 conditions, 11887 events. 7828/11887 cut-off events. For 483278/483278 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 72783 event pairs, 2136 based on Foata normal form. 16/11903 useless extension candidates. Maximal degree in co-relation 120440. Up to 11127 conditions per place. [2023-11-29 04:10:31,804 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 837 selfloop transitions, 131 changer transitions 0/969 dead transitions. [2023-11-29 04:10:31,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 969 transitions, 24602 flow [2023-11-29 04:10:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:10:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:10:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2023-11-29 04:10:31,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 04:10:31,806 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 93 transitions. [2023-11-29 04:10:31,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 93 transitions. [2023-11-29 04:10:31,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:31,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 93 transitions. [2023-11-29 04:10:31,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:31,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:31,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:31,807 INFO L175 Difference]: Start difference. First operand has 347 places, 937 transitions, 22275 flow. Second operand 7 states and 93 transitions. [2023-11-29 04:10:31,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 969 transitions, 24602 flow [2023-11-29 04:10:35,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 969 transitions, 24155 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-11-29 04:10:35,423 INFO L231 Difference]: Finished difference. Result has 349 places, 945 transitions, 22306 flow [2023-11-29 04:10:35,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=21830, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22306, PETRI_PLACES=349, PETRI_TRANSITIONS=945} [2023-11-29 04:10:35,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-11-29 04:10:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 945 transitions, 22306 flow [2023-11-29 04:10:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:35,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:35,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:35,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 04:10:35,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:35,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 308584962, now seen corresponding path program 7 times [2023-11-29 04:10:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:35,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189749521] [2023-11-29 04:10:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:35,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:35,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189749521] [2023-11-29 04:10:35,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189749521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373178380] [2023-11-29 04:10:35,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:10:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:35,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:35,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:10:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:35,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:10:35,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:35,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373178380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:35,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:35,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-29 04:10:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484206689] [2023-11-29 04:10:35,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:35,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:10:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:10:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:10:35,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:35,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 945 transitions, 22306 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:35,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:35,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:35,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:41,064 INFO L124 PetriNetUnfolderBase]: 7987/12123 cut-off events. [2023-11-29 04:10:41,064 INFO L125 PetriNetUnfolderBase]: For 504680/504680 co-relation queries the response was YES. [2023-11-29 04:10:41,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124257 conditions, 12123 events. 7987/12123 cut-off events. For 504680/504680 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 74769 event pairs, 1978 based on Foata normal form. 54/12177 useless extension candidates. Maximal degree in co-relation 123706. Up to 10155 conditions per place. [2023-11-29 04:10:41,294 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 846 selfloop transitions, 293 changer transitions 0/1140 dead transitions. [2023-11-29 04:10:41,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1140 transitions, 27730 flow [2023-11-29 04:10:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:10:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 04:10:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 247 transitions. [2023-11-29 04:10:41,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 04:10:41,296 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 247 transitions. [2023-11-29 04:10:41,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 247 transitions. [2023-11-29 04:10:41,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:41,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 247 transitions. [2023-11-29 04:10:41,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 13.0) internal successors, (247), 19 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 27.0) internal successors, (540), 20 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,298 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 27.0) internal successors, (540), 20 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,298 INFO L175 Difference]: Start difference. First operand has 349 places, 945 transitions, 22306 flow. Second operand 19 states and 247 transitions. [2023-11-29 04:10:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1140 transitions, 27730 flow [2023-11-29 04:10:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1140 transitions, 27567 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-11-29 04:10:45,348 INFO L231 Difference]: Finished difference. Result has 372 places, 1001 transitions, 24046 flow [2023-11-29 04:10:45,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=22156, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24046, PETRI_PLACES=372, PETRI_TRANSITIONS=1001} [2023-11-29 04:10:45,349 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2023-11-29 04:10:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1001 transitions, 24046 flow [2023-11-29 04:10:45,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:45,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:45,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:45,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:10:45,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:10:45,550 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:45,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash 725781033, now seen corresponding path program 17 times [2023-11-29 04:10:45,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:45,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790585964] [2023-11-29 04:10:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:45,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:45,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:45,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790585964] [2023-11-29 04:10:45,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790585964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:10:45,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:10:45,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:10:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671682212] [2023-11-29 04:10:45,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:10:45,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:10:45,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:45,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:10:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:10:45,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1001 transitions, 24046 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:50,350 INFO L124 PetriNetUnfolderBase]: 7993/12133 cut-off events. [2023-11-29 04:10:50,351 INFO L125 PetriNetUnfolderBase]: For 520626/520626 co-relation queries the response was YES. [2023-11-29 04:10:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126535 conditions, 12133 events. 7993/12133 cut-off events. For 520626/520626 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 74532 event pairs, 2200 based on Foata normal form. 2/12135 useless extension candidates. Maximal degree in co-relation 125978. Up to 11347 conditions per place. [2023-11-29 04:10:50,713 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 876 selfloop transitions, 142 changer transitions 2/1021 dead transitions. [2023-11-29 04:10:50,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1021 transitions, 26340 flow [2023-11-29 04:10:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:10:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:10:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2023-11-29 04:10:50,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-11-29 04:10:50,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 87 transitions. [2023-11-29 04:10:50,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 87 transitions. [2023-11-29 04:10:50,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:50,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 87 transitions. [2023-11-29 04:10:50,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:50,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:50,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:50,714 INFO L175 Difference]: Start difference. First operand has 372 places, 1001 transitions, 24046 flow. Second operand 7 states and 87 transitions. [2023-11-29 04:10:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1021 transitions, 26340 flow [2023-11-29 04:10:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1021 transitions, 25953 flow, removed 66 selfloop flow, removed 4 redundant places. [2023-11-29 04:10:55,059 INFO L231 Difference]: Finished difference. Result has 374 places, 1004 transitions, 24028 flow [2023-11-29 04:10:55,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23665, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24028, PETRI_PLACES=374, PETRI_TRANSITIONS=1004} [2023-11-29 04:10:55,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2023-11-29 04:10:55,060 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1004 transitions, 24028 flow [2023-11-29 04:10:55,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:55,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:55,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 04:10:55,061 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:10:55,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 85363339, now seen corresponding path program 18 times [2023-11-29 04:10:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932464423] [2023-11-29 04:10:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:55,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:55,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932464423] [2023-11-29 04:10:55,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932464423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:10:55,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:10:55,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:10:55,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452595556] [2023-11-29 04:10:55,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:10:55,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:10:55,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:55,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:10:55,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:10:55,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:10:55,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1004 transitions, 24028 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:55,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:55,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:10:55,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:59,995 INFO L124 PetriNetUnfolderBase]: 8012/12166 cut-off events. [2023-11-29 04:10:59,995 INFO L125 PetriNetUnfolderBase]: For 521708/521708 co-relation queries the response was YES. [2023-11-29 04:11:00,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126666 conditions, 12166 events. 8012/12166 cut-off events. For 521708/521708 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 74828 event pairs, 2210 based on Foata normal form. 16/12182 useless extension candidates. Maximal degree in co-relation 126108. Up to 11361 conditions per place. [2023-11-29 04:11:00,207 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 892 selfloop transitions, 144 changer transitions 0/1037 dead transitions. [2023-11-29 04:11:00,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1037 transitions, 26514 flow [2023-11-29 04:11:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:11:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2023-11-29 04:11:00,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 04:11:00,208 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 93 transitions. [2023-11-29 04:11:00,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 93 transitions. [2023-11-29 04:11:00,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:00,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 93 transitions. [2023-11-29 04:11:00,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,209 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:00,209 INFO L175 Difference]: Start difference. First operand has 374 places, 1004 transitions, 24028 flow. Second operand 7 states and 93 transitions. [2023-11-29 04:11:00,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1037 transitions, 26514 flow [2023-11-29 04:11:04,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1037 transitions, 26235 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 04:11:04,625 INFO L231 Difference]: Finished difference. Result has 377 places, 1007 transitions, 24139 flow [2023-11-29 04:11:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23749, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24139, PETRI_PLACES=377, PETRI_TRANSITIONS=1007} [2023-11-29 04:11:04,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2023-11-29 04:11:04,626 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1007 transitions, 24139 flow [2023-11-29 04:11:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:04,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:04,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:04,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 04:11:04,626 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:04,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 950101329, now seen corresponding path program 5 times [2023-11-29 04:11:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832982654] [2023-11-29 04:11:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832982654] [2023-11-29 04:11:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832982654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:04,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:04,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:11:04,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395369992] [2023-11-29 04:11:04,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:04,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:11:04,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:11:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:04,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:04,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1007 transitions, 24139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:04,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:04,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:04,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:09,779 INFO L124 PetriNetUnfolderBase]: 8010/12153 cut-off events. [2023-11-29 04:11:09,779 INFO L125 PetriNetUnfolderBase]: For 529917/529917 co-relation queries the response was YES. [2023-11-29 04:11:09,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127285 conditions, 12153 events. 8010/12153 cut-off events. For 529917/529917 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 74649 event pairs, 2216 based on Foata normal form. 4/12157 useless extension candidates. Maximal degree in co-relation 126726. Up to 11365 conditions per place. [2023-11-29 04:11:09,978 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 884 selfloop transitions, 146 changer transitions 0/1031 dead transitions. [2023-11-29 04:11:09,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1031 transitions, 26506 flow [2023-11-29 04:11:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:11:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-29 04:11:09,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-29 04:11:09,979 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-29 04:11:09,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-29 04:11:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:09,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-29 04:11:09,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:09,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:09,980 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:09,980 INFO L175 Difference]: Start difference. First operand has 377 places, 1007 transitions, 24139 flow. Second operand 7 states and 88 transitions. [2023-11-29 04:11:09,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1031 transitions, 26506 flow [2023-11-29 04:11:14,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1031 transitions, 26200 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-29 04:11:14,313 INFO L231 Difference]: Finished difference. Result has 377 places, 1010 transitions, 24193 flow [2023-11-29 04:11:14,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23804, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24193, PETRI_PLACES=377, PETRI_TRANSITIONS=1010} [2023-11-29 04:11:14,314 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2023-11-29 04:11:14,315 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1010 transitions, 24193 flow [2023-11-29 04:11:14,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:14,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:14,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 04:11:14,315 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:14,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1081199524, now seen corresponding path program 8 times [2023-11-29 04:11:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:14,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933657303] [2023-11-29 04:11:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:14,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933657303] [2023-11-29 04:11:14,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933657303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:14,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:14,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:11:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162400706] [2023-11-29 04:11:14,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:11:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:11:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:14,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:14,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1010 transitions, 24193 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:14,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:14,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:19,333 INFO L124 PetriNetUnfolderBase]: 8020/12171 cut-off events. [2023-11-29 04:11:19,334 INFO L125 PetriNetUnfolderBase]: For 529828/529828 co-relation queries the response was YES. [2023-11-29 04:11:19,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127397 conditions, 12171 events. 8020/12171 cut-off events. For 529828/529828 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 74820 event pairs, 2200 based on Foata normal form. 4/12175 useless extension candidates. Maximal degree in co-relation 126838. Up to 11371 conditions per place. [2023-11-29 04:11:19,548 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 884 selfloop transitions, 144 changer transitions 4/1033 dead transitions. [2023-11-29 04:11:19,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1033 transitions, 26483 flow [2023-11-29 04:11:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:11:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-29 04:11:19,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 04:11:19,550 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-29 04:11:19,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-29 04:11:19,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:19,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-29 04:11:19,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:19,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:19,551 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:19,551 INFO L175 Difference]: Start difference. First operand has 377 places, 1010 transitions, 24193 flow. Second operand 7 states and 90 transitions. [2023-11-29 04:11:19,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1033 transitions, 26483 flow [2023-11-29 04:11:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1033 transitions, 26202 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 04:11:23,873 INFO L231 Difference]: Finished difference. Result has 381 places, 1012 transitions, 24265 flow [2023-11-29 04:11:23,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23912, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24265, PETRI_PLACES=381, PETRI_TRANSITIONS=1012} [2023-11-29 04:11:23,874 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 351 predicate places. [2023-11-29 04:11:23,874 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1012 transitions, 24265 flow [2023-11-29 04:11:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:23,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:23,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-29 04:11:23,875 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:23,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2121488676, now seen corresponding path program 9 times [2023-11-29 04:11:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876228257] [2023-11-29 04:11:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:23,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:23,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876228257] [2023-11-29 04:11:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876228257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:23,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:11:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504217285] [2023-11-29 04:11:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:23,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:11:23,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:23,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:11:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:23,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:23,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1012 transitions, 24265 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:23,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:23,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:28,917 INFO L124 PetriNetUnfolderBase]: 8016/12167 cut-off events. [2023-11-29 04:11:28,917 INFO L125 PetriNetUnfolderBase]: For 533565/533565 co-relation queries the response was YES. [2023-11-29 04:11:29,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127441 conditions, 12167 events. 8016/12167 cut-off events. For 533565/533565 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 74818 event pairs, 2211 based on Foata normal form. 4/12171 useless extension candidates. Maximal degree in co-relation 127036. Up to 11374 conditions per place. [2023-11-29 04:11:29,129 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 884 selfloop transitions, 141 changer transitions 4/1030 dead transitions. [2023-11-29 04:11:29,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1030 transitions, 26482 flow [2023-11-29 04:11:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:11:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-29 04:11:29,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-29 04:11:29,131 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-29 04:11:29,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-29 04:11:29,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:29,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-29 04:11:29,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:29,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:29,131 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:29,131 INFO L175 Difference]: Start difference. First operand has 381 places, 1012 transitions, 24265 flow. Second operand 7 states and 88 transitions. [2023-11-29 04:11:29,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1030 transitions, 26482 flow [2023-11-29 04:11:33,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1030 transitions, 26190 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-29 04:11:33,467 INFO L231 Difference]: Finished difference. Result has 381 places, 1011 transitions, 24231 flow [2023-11-29 04:11:33,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23973, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24231, PETRI_PLACES=381, PETRI_TRANSITIONS=1011} [2023-11-29 04:11:33,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 351 predicate places. [2023-11-29 04:11:33,468 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1011 transitions, 24231 flow [2023-11-29 04:11:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:33,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:33,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-29 04:11:33,469 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:33,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 361449686, now seen corresponding path program 10 times [2023-11-29 04:11:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021165533] [2023-11-29 04:11:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021165533] [2023-11-29 04:11:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021165533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755342261] [2023-11-29 04:11:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:11:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:33,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:33,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:11:33,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:11:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:33,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:11:33,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:33,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755342261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:33,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 04:11:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184654622] [2023-11-29 04:11:33,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:33,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:11:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:11:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:11:33,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:33,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1011 transitions, 24231 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:33,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:33,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:33,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:39,190 INFO L124 PetriNetUnfolderBase]: 8148/12367 cut-off events. [2023-11-29 04:11:39,190 INFO L125 PetriNetUnfolderBase]: For 536137/536137 co-relation queries the response was YES. [2023-11-29 04:11:39,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129399 conditions, 12367 events. 8148/12367 cut-off events. For 536137/536137 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 76275 event pairs, 2094 based on Foata normal form. 50/12417 useless extension candidates. Maximal degree in co-relation 128994. Up to 11343 conditions per place. [2023-11-29 04:11:39,416 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 886 selfloop transitions, 216 changer transitions 0/1103 dead transitions. [2023-11-29 04:11:39,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1103 transitions, 27877 flow [2023-11-29 04:11:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:11:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 04:11:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2023-11-29 04:11:39,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2023-11-29 04:11:39,417 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 142 transitions. [2023-11-29 04:11:39,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 142 transitions. [2023-11-29 04:11:39,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:39,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 142 transitions. [2023-11-29 04:11:39,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:39,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:39,418 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:39,418 INFO L175 Difference]: Start difference. First operand has 381 places, 1011 transitions, 24231 flow. Second operand 11 states and 142 transitions. [2023-11-29 04:11:39,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1103 transitions, 27877 flow [2023-11-29 04:11:43,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1103 transitions, 27601 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 04:11:43,908 INFO L231 Difference]: Finished difference. Result has 391 places, 1061 transitions, 25690 flow [2023-11-29 04:11:43,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=23977, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=25690, PETRI_PLACES=391, PETRI_TRANSITIONS=1061} [2023-11-29 04:11:43,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2023-11-29 04:11:43,909 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1061 transitions, 25690 flow [2023-11-29 04:11:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:43,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:43,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:11:44,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 04:11:44,110 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:44,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:44,111 INFO L85 PathProgramCache]: Analyzing trace with hash -283266597, now seen corresponding path program 19 times [2023-11-29 04:11:44,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:44,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018007258] [2023-11-29 04:11:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:44,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018007258] [2023-11-29 04:11:44,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018007258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:44,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:44,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:11:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499796110] [2023-11-29 04:11:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:44,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:11:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:11:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:44,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:44,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1061 transitions, 25690 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:44,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:44,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:44,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:49,523 INFO L124 PetriNetUnfolderBase]: 8235/12496 cut-off events. [2023-11-29 04:11:49,523 INFO L125 PetriNetUnfolderBase]: For 558312/558312 co-relation queries the response was YES. [2023-11-29 04:11:49,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132701 conditions, 12496 events. 8235/12496 cut-off events. For 558312/558312 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 77269 event pairs, 2167 based on Foata normal form. 30/12526 useless extension candidates. Maximal degree in co-relation 132136. Up to 11610 conditions per place. [2023-11-29 04:11:49,760 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 939 selfloop transitions, 169 changer transitions 0/1109 dead transitions. [2023-11-29 04:11:49,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1109 transitions, 28659 flow [2023-11-29 04:11:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:11:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2023-11-29 04:11:49,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-29 04:11:49,761 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 98 transitions. [2023-11-29 04:11:49,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 98 transitions. [2023-11-29 04:11:49,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:49,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 98 transitions. [2023-11-29 04:11:49,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:49,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:49,762 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:49,762 INFO L175 Difference]: Start difference. First operand has 391 places, 1061 transitions, 25690 flow. Second operand 7 states and 98 transitions. [2023-11-29 04:11:49,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1109 transitions, 28659 flow [2023-11-29 04:11:54,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1109 transitions, 28477 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-11-29 04:11:54,819 INFO L231 Difference]: Finished difference. Result has 395 places, 1078 transitions, 26319 flow [2023-11-29 04:11:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=25508, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26319, PETRI_PLACES=395, PETRI_TRANSITIONS=1078} [2023-11-29 04:11:54,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2023-11-29 04:11:54,821 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1078 transitions, 26319 flow [2023-11-29 04:11:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:54,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:54,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-29 04:11:54,821 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:11:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1177521863, now seen corresponding path program 20 times [2023-11-29 04:11:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394497353] [2023-11-29 04:11:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:54,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394497353] [2023-11-29 04:11:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394497353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:54,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:54,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:11:54,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120266868] [2023-11-29 04:11:54,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:54,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:11:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:11:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:11:54,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1078 transitions, 26319 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:54,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:54,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:11:54,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:00,230 INFO L124 PetriNetUnfolderBase]: 8251/12524 cut-off events. [2023-11-29 04:12:00,230 INFO L125 PetriNetUnfolderBase]: For 586780/586780 co-relation queries the response was YES. [2023-11-29 04:12:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134641 conditions, 12524 events. 8251/12524 cut-off events. For 586780/586780 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 77468 event pairs, 2188 based on Foata normal form. 12/12536 useless extension candidates. Maximal degree in co-relation 134074. Up to 11685 conditions per place. [2023-11-29 04:12:00,468 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 947 selfloop transitions, 155 changer transitions 0/1103 dead transitions. [2023-11-29 04:12:00,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1103 transitions, 28846 flow [2023-11-29 04:12:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:12:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:12:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-29 04:12:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 04:12:00,469 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-29 04:12:00,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-29 04:12:00,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:00,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-29 04:12:00,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:00,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:00,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:00,470 INFO L175 Difference]: Start difference. First operand has 395 places, 1078 transitions, 26319 flow. Second operand 7 states and 90 transitions. [2023-11-29 04:12:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1103 transitions, 28846 flow [2023-11-29 04:12:05,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1103 transitions, 28437 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-11-29 04:12:05,365 INFO L231 Difference]: Finished difference. Result has 398 places, 1081 transitions, 26319 flow [2023-11-29 04:12:05,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=25910, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=923, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26319, PETRI_PLACES=398, PETRI_TRANSITIONS=1081} [2023-11-29 04:12:05,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2023-11-29 04:12:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1081 transitions, 26319 flow [2023-11-29 04:12:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:05,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:05,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:12:05,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-29 04:12:05,368 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:12:05,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 254588981, now seen corresponding path program 21 times [2023-11-29 04:12:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310658375] [2023-11-29 04:12:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:05,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:05,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310658375] [2023-11-29 04:12:05,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310658375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:12:05,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:12:05,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:12:05,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372992816] [2023-11-29 04:12:05,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:12:05,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:12:05,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:12:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:12:05,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:12:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1081 transitions, 26319 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:05,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:12:05,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:10,800 INFO L124 PetriNetUnfolderBase]: 8280/12573 cut-off events. [2023-11-29 04:12:10,801 INFO L125 PetriNetUnfolderBase]: For 591081/591081 co-relation queries the response was YES. [2023-11-29 04:12:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134880 conditions, 12573 events. 8280/12573 cut-off events. For 591081/591081 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 77943 event pairs, 2190 based on Foata normal form. 20/12593 useless extension candidates. Maximal degree in co-relation 134312. Up to 11693 conditions per place. [2023-11-29 04:12:11,026 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 947 selfloop transitions, 171 changer transitions 0/1119 dead transitions. [2023-11-29 04:12:11,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1119 transitions, 29120 flow [2023-11-29 04:12:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:12:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:12:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2023-11-29 04:12:11,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-11-29 04:12:11,028 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 96 transitions. [2023-11-29 04:12:11,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 96 transitions. [2023-11-29 04:12:11,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:11,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 96 transitions. [2023-11-29 04:12:11,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:11,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:11,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:11,029 INFO L175 Difference]: Start difference. First operand has 398 places, 1081 transitions, 26319 flow. Second operand 7 states and 96 transitions. [2023-11-29 04:12:11,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1119 transitions, 29120 flow [2023-11-29 04:12:16,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1119 transitions, 28814 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 04:12:16,179 INFO L231 Difference]: Finished difference. Result has 400 places, 1087 transitions, 26563 flow [2023-11-29 04:12:16,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26013, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26563, PETRI_PLACES=400, PETRI_TRANSITIONS=1087} [2023-11-29 04:12:16,180 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2023-11-29 04:12:16,180 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1087 transitions, 26563 flow [2023-11-29 04:12:16,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:16,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:16,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:12:16,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-29 04:12:16,180 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:12:16,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1356551404, now seen corresponding path program 11 times [2023-11-29 04:12:16,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:16,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324034125] [2023-11-29 04:12:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:16,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324034125] [2023-11-29 04:12:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324034125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:12:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:12:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:12:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727578378] [2023-11-29 04:12:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:12:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:12:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:12:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:12:16,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:12:16,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1087 transitions, 26563 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:16,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:16,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:12:16,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:21,764 INFO L124 PetriNetUnfolderBase]: 8338/12663 cut-off events. [2023-11-29 04:12:21,765 INFO L125 PetriNetUnfolderBase]: For 591625/591625 co-relation queries the response was YES. [2023-11-29 04:12:21,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135967 conditions, 12663 events. 8338/12663 cut-off events. For 591625/591625 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 78580 event pairs, 2234 based on Foata normal form. 20/12683 useless extension candidates. Maximal degree in co-relation 135398. Up to 11767 conditions per place. [2023-11-29 04:12:21,992 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 962 selfloop transitions, 167 changer transitions 0/1130 dead transitions. [2023-11-29 04:12:21,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1130 transitions, 29503 flow [2023-11-29 04:12:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:12:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:12:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2023-11-29 04:12:21,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-11-29 04:12:21,994 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 96 transitions. [2023-11-29 04:12:21,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 96 transitions. [2023-11-29 04:12:21,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:21,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 96 transitions. [2023-11-29 04:12:21,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:21,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:21,995 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:21,995 INFO L175 Difference]: Start difference. First operand has 400 places, 1087 transitions, 26563 flow. Second operand 7 states and 96 transitions. [2023-11-29 04:12:21,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1130 transitions, 29503 flow [2023-11-29 04:12:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1130 transitions, 29151 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 04:12:27,166 INFO L231 Difference]: Finished difference. Result has 403 places, 1101 transitions, 26970 flow [2023-11-29 04:12:27,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26223, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26970, PETRI_PLACES=403, PETRI_TRANSITIONS=1101} [2023-11-29 04:12:27,168 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 373 predicate places. [2023-11-29 04:12:27,168 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1101 transitions, 26970 flow [2023-11-29 04:12:27,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:27,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:27,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:12:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-29 04:12:27,169 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:12:27,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash -976934067, now seen corresponding path program 6 times [2023-11-29 04:12:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197967980] [2023-11-29 04:12:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197967980] [2023-11-29 04:12:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197967980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:27,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118059599] [2023-11-29 04:12:27,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:12:27,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:27,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:27,310 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:27,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:12:27,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:12:27,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:27,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:12:27,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:27,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118059599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:27,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-29 04:12:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295939347] [2023-11-29 04:12:27,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:27,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:12:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:12:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:12:27,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:12:27,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1101 transitions, 26970 flow. Second operand has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:27,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:27,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:12:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:33,564 INFO L124 PetriNetUnfolderBase]: 8396/12749 cut-off events. [2023-11-29 04:12:33,565 INFO L125 PetriNetUnfolderBase]: For 596786/596786 co-relation queries the response was YES. [2023-11-29 04:12:33,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137259 conditions, 12749 events. 8396/12749 cut-off events. For 596786/596786 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 79174 event pairs, 1114 based on Foata normal form. 8/12757 useless extension candidates. Maximal degree in co-relation 136688. Up to 11057 conditions per place. [2023-11-29 04:12:33,807 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 954 selfloop transitions, 203 changer transitions 0/1158 dead transitions. [2023-11-29 04:12:33,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1158 transitions, 30113 flow [2023-11-29 04:12:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:12:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:12:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2023-11-29 04:12:33,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-29 04:12:33,808 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 138 transitions. [2023-11-29 04:12:33,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 138 transitions. [2023-11-29 04:12:33,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:33,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 138 transitions. [2023-11-29 04:12:33,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:33,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:33,810 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:33,810 INFO L175 Difference]: Start difference. First operand has 403 places, 1101 transitions, 26970 flow. Second operand 10 states and 138 transitions. [2023-11-29 04:12:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1158 transitions, 30113 flow [2023-11-29 04:12:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1158 transitions, 29907 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 04:12:39,292 INFO L231 Difference]: Finished difference. Result has 411 places, 1111 transitions, 27461 flow [2023-11-29 04:12:39,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26772, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27461, PETRI_PLACES=411, PETRI_TRANSITIONS=1111} [2023-11-29 04:12:39,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2023-11-29 04:12:39,293 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1111 transitions, 27461 flow [2023-11-29 04:12:39,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:39,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:39,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:12:39,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:12:39,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 04:12:39,494 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:12:39,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -456716175, now seen corresponding path program 22 times [2023-11-29 04:12:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258652610] [2023-11-29 04:12:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:39,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258652610] [2023-11-29 04:12:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258652610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:12:39,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:12:39,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:12:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712738506] [2023-11-29 04:12:39,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:12:39,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:12:39,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:12:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:12:39,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:12:39,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1111 transitions, 27461 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:39,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:39,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:12:39,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:45,245 INFO L124 PetriNetUnfolderBase]: 8395/12750 cut-off events. [2023-11-29 04:12:45,245 INFO L125 PetriNetUnfolderBase]: For 609071/609071 co-relation queries the response was YES. [2023-11-29 04:12:45,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137698 conditions, 12750 events. 8395/12750 cut-off events. For 609071/609071 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 79283 event pairs, 2244 based on Foata normal form. 2/12752 useless extension candidates. Maximal degree in co-relation 137125. Up to 11883 conditions per place. [2023-11-29 04:12:45,487 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 958 selfloop transitions, 165 changer transitions 2/1126 dead transitions. [2023-11-29 04:12:45,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1126 transitions, 29864 flow [2023-11-29 04:12:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:12:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:12:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-29 04:12:45,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-11-29 04:12:45,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-29 04:12:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-29 04:12:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:45,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-29 04:12:45,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:45,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:45,489 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:45,489 INFO L175 Difference]: Start difference. First operand has 411 places, 1111 transitions, 27461 flow. Second operand 7 states and 86 transitions. [2023-11-29 04:12:45,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1126 transitions, 29864 flow [2023-11-29 04:12:51,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1126 transitions, 29684 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 04:12:51,079 INFO L231 Difference]: Finished difference. Result has 414 places, 1110 transitions, 27596 flow [2023-11-29 04:12:51,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=27281, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27596, PETRI_PLACES=414, PETRI_TRANSITIONS=1110} [2023-11-29 04:12:51,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2023-11-29 04:12:51,081 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1110 transitions, 27596 flow [2023-11-29 04:12:51,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:51,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:51,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:12:51,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-29 04:12:51,081 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:12:51,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash -74761999, now seen corresponding path program 23 times [2023-11-29 04:12:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:51,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610872554] [2023-11-29 04:12:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610872554] [2023-11-29 04:12:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610872554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:12:51,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:12:51,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:12:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923794590] [2023-11-29 04:12:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:12:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:12:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:12:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:12:51,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:12:51,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1110 transitions, 27596 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:51,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:51,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:12:51,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:57,417 INFO L124 PetriNetUnfolderBase]: 8884/13441 cut-off events. [2023-11-29 04:12:57,417 INFO L125 PetriNetUnfolderBase]: For 685847/685847 co-relation queries the response was YES. [2023-11-29 04:12:57,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148082 conditions, 13441 events. 8884/13441 cut-off events. For 685847/685847 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 83702 event pairs, 2192 based on Foata normal form. 30/13471 useless extension candidates. Maximal degree in co-relation 147509. Up to 11757 conditions per place. [2023-11-29 04:12:57,705 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 941 selfloop transitions, 294 changer transitions 0/1236 dead transitions. [2023-11-29 04:12:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1236 transitions, 32460 flow [2023-11-29 04:12:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:12:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:12:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2023-11-29 04:12:57,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2023-11-29 04:12:57,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 101 transitions. [2023-11-29 04:12:57,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 101 transitions. [2023-11-29 04:12:57,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:57,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 101 transitions. [2023-11-29 04:12:57,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:57,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:57,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:57,707 INFO L175 Difference]: Start difference. First operand has 414 places, 1110 transitions, 27596 flow. Second operand 7 states and 101 transitions. [2023-11-29 04:12:57,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1236 transitions, 32460 flow [2023-11-29 04:13:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1236 transitions, 32130 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 04:13:03,703 INFO L231 Difference]: Finished difference. Result has 417 places, 1150 transitions, 29221 flow [2023-11-29 04:13:03,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=27266, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29221, PETRI_PLACES=417, PETRI_TRANSITIONS=1150} [2023-11-29 04:13:03,704 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 387 predicate places. [2023-11-29 04:13:03,704 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1150 transitions, 29221 flow [2023-11-29 04:13:03,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:03,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:03,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-11-29 04:13:03,704 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:03,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1828925601, now seen corresponding path program 24 times [2023-11-29 04:13:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186883149] [2023-11-29 04:13:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:03,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:03,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186883149] [2023-11-29 04:13:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186883149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:13:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460934334] [2023-11-29 04:13:03,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:03,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:13:03,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:13:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:13:03,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:13:03,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1150 transitions, 29221 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:03,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:13:03,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:13:03,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:10,535 INFO L124 PetriNetUnfolderBase]: 9142/14074 cut-off events. [2023-11-29 04:13:10,535 INFO L125 PetriNetUnfolderBase]: For 766522/766522 co-relation queries the response was YES. [2023-11-29 04:13:10,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157331 conditions, 14074 events. 9142/14074 cut-off events. For 766522/766522 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 90914 event pairs, 2146 based on Foata normal form. 46/14120 useless extension candidates. Maximal degree in co-relation 156755. Up to 11151 conditions per place. [2023-11-29 04:13:10,839 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1042 selfloop transitions, 293 changer transitions 0/1336 dead transitions. [2023-11-29 04:13:10,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1336 transitions, 35227 flow [2023-11-29 04:13:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:13:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2023-11-29 04:13:10,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-29 04:13:10,840 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 102 transitions. [2023-11-29 04:13:10,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 102 transitions. [2023-11-29 04:13:10,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:10,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 102 transitions. [2023-11-29 04:13:10,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:10,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:10,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:10,842 INFO L175 Difference]: Start difference. First operand has 417 places, 1150 transitions, 29221 flow. Second operand 7 states and 102 transitions. [2023-11-29 04:13:10,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1336 transitions, 35227 flow [2023-11-29 04:13:17,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1336 transitions, 34588 flow, removed 197 selfloop flow, removed 2 redundant places. [2023-11-29 04:13:17,900 INFO L231 Difference]: Finished difference. Result has 423 places, 1164 transitions, 29708 flow [2023-11-29 04:13:17,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=28582, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29708, PETRI_PLACES=423, PETRI_TRANSITIONS=1164} [2023-11-29 04:13:17,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 393 predicate places. [2023-11-29 04:13:17,901 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1164 transitions, 29708 flow [2023-11-29 04:13:17,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:17,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:17,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-11-29 04:13:17,901 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:17,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1741526410, now seen corresponding path program 12 times [2023-11-29 04:13:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063492281] [2023-11-29 04:13:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:18,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063492281] [2023-11-29 04:13:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063492281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:18,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:18,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:13:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529345517] [2023-11-29 04:13:18,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:13:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:13:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:13:18,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:13:18,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1164 transitions, 29708 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:18,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:13:18,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:13:18,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:24,600 INFO L124 PetriNetUnfolderBase]: 9145/14100 cut-off events. [2023-11-29 04:13:24,600 INFO L125 PetriNetUnfolderBase]: For 724565/724565 co-relation queries the response was YES. [2023-11-29 04:13:24,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155498 conditions, 14100 events. 9145/14100 cut-off events. For 724565/724565 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 91467 event pairs, 2482 based on Foata normal form. 12/14112 useless extension candidates. Maximal degree in co-relation 154919. Up to 13179 conditions per place. [2023-11-29 04:13:24,878 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 990 selfloop transitions, 190 changer transitions 15/1196 dead transitions. [2023-11-29 04:13:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1196 transitions, 32402 flow [2023-11-29 04:13:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:13:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-29 04:13:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 04:13:24,879 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-29 04:13:24,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-29 04:13:24,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:24,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-29 04:13:24,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:24,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:24,880 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:24,880 INFO L175 Difference]: Start difference. First operand has 423 places, 1164 transitions, 29708 flow. Second operand 7 states and 90 transitions. [2023-11-29 04:13:24,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1196 transitions, 32402 flow [2023-11-29 04:13:31,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1196 transitions, 31828 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-11-29 04:13:31,805 INFO L231 Difference]: Finished difference. Result has 427 places, 1160 transitions, 29385 flow [2023-11-29 04:13:31,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=29134, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29385, PETRI_PLACES=427, PETRI_TRANSITIONS=1160} [2023-11-29 04:13:31,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2023-11-29 04:13:31,806 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1160 transitions, 29385 flow [2023-11-29 04:13:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:31,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-29 04:13:31,806 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:31,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2138258272, now seen corresponding path program 13 times [2023-11-29 04:13:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69493484] [2023-11-29 04:13:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69493484] [2023-11-29 04:13:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69493484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:13:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019053156] [2023-11-29 04:13:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:13:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:13:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:13:31,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:13:31,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1160 transitions, 29385 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:31,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:13:31,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:13:31,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:38,739 INFO L124 PetriNetUnfolderBase]: 9148/14185 cut-off events. [2023-11-29 04:13:38,739 INFO L125 PetriNetUnfolderBase]: For 722333/722333 co-relation queries the response was YES. [2023-11-29 04:13:38,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155390 conditions, 14185 events. 9148/14185 cut-off events. For 722333/722333 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 93106 event pairs, 2394 based on Foata normal form. 40/14225 useless extension candidates. Maximal degree in co-relation 154809. Up to 12675 conditions per place. [2023-11-29 04:13:39,024 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 963 selfloop transitions, 228 changer transitions 7/1199 dead transitions. [2023-11-29 04:13:39,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1199 transitions, 32195 flow [2023-11-29 04:13:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:13:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2023-11-29 04:13:39,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2023-11-29 04:13:39,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 95 transitions. [2023-11-29 04:13:39,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 95 transitions. [2023-11-29 04:13:39,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:39,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 95 transitions. [2023-11-29 04:13:39,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:39,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:39,026 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:39,026 INFO L175 Difference]: Start difference. First operand has 427 places, 1160 transitions, 29385 flow. Second operand 7 states and 95 transitions. [2023-11-29 04:13:39,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1199 transitions, 32195 flow [2023-11-29 04:13:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1199 transitions, 31805 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-29 04:13:45,900 INFO L231 Difference]: Finished difference. Result has 428 places, 1160 transitions, 29564 flow [2023-11-29 04:13:45,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=28997, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29564, PETRI_PLACES=428, PETRI_TRANSITIONS=1160} [2023-11-29 04:13:45,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2023-11-29 04:13:45,901 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1160 transitions, 29564 flow [2023-11-29 04:13:45,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:45,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:45,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-29 04:13:45,901 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:45,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2093081585, now seen corresponding path program 25 times [2023-11-29 04:13:45,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:45,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149024582] [2023-11-29 04:13:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:45,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149024582] [2023-11-29 04:13:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149024582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:46,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:46,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:13:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992200723] [2023-11-29 04:13:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:46,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:13:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:13:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:13:46,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:13:46,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1160 transitions, 29564 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:46,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:13:46,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:13:46,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:52,823 INFO L124 PetriNetUnfolderBase]: 9117/14129 cut-off events. [2023-11-29 04:13:52,823 INFO L125 PetriNetUnfolderBase]: For 729785/729785 co-relation queries the response was YES. [2023-11-29 04:13:53,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156019 conditions, 14129 events. 9117/14129 cut-off events. For 729785/729785 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 92606 event pairs, 2496 based on Foata normal form. 2/14131 useless extension candidates. Maximal degree in co-relation 155437. Up to 13235 conditions per place. [2023-11-29 04:13:53,121 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 980 selfloop transitions, 194 changer transitions 2/1177 dead transitions. [2023-11-29 04:13:53,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1177 transitions, 32092 flow [2023-11-29 04:13:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:13:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-29 04:13:53,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 04:13:53,123 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-29 04:13:53,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-29 04:13:53,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:53,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-29 04:13:53,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:53,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:53,124 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:53,124 INFO L175 Difference]: Start difference. First operand has 428 places, 1160 transitions, 29564 flow. Second operand 7 states and 84 transitions. [2023-11-29 04:13:53,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1177 transitions, 32092 flow [2023-11-29 04:14:00,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1177 transitions, 31654 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-11-29 04:14:00,346 INFO L231 Difference]: Finished difference. Result has 430 places, 1160 transitions, 29519 flow [2023-11-29 04:14:00,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=29126, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29519, PETRI_PLACES=430, PETRI_TRANSITIONS=1160} [2023-11-29 04:14:00,347 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 400 predicate places. [2023-11-29 04:14:00,347 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1160 transitions, 29519 flow [2023-11-29 04:14:00,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:00,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:14:00,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:14:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-11-29 04:14:00,348 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:14:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -275017168, now seen corresponding path program 14 times [2023-11-29 04:14:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365439849] [2023-11-29 04:14:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365439849] [2023-11-29 04:14:00,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365439849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:14:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905337280] [2023-11-29 04:14:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:14:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:14:00,444 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:14:00,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:14:00,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:14:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:14:00,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:14:00,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:14:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:00,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:14:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905337280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:14:00,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:14:00,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-29 04:14:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451906219] [2023-11-29 04:14:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:14:00,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:14:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:14:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:14:00,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:14:00,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1160 transitions, 29519 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:00,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:00,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:14:00,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:14:08,660 INFO L124 PetriNetUnfolderBase]: 9441/14706 cut-off events. [2023-11-29 04:14:08,660 INFO L125 PetriNetUnfolderBase]: For 758010/758010 co-relation queries the response was YES. [2023-11-29 04:14:08,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161317 conditions, 14706 events. 9441/14706 cut-off events. For 758010/758010 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 98150 event pairs, 2138 based on Foata normal form. 84/14790 useless extension candidates. Maximal degree in co-relation 160735. Up to 11921 conditions per place. [2023-11-29 04:14:08,952 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 909 selfloop transitions, 473 changer transitions 0/1383 dead transitions. [2023-11-29 04:14:08,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1383 transitions, 36157 flow [2023-11-29 04:14:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:14:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:14:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 254 transitions. [2023-11-29 04:14:08,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479717813051146 [2023-11-29 04:14:08,954 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 254 transitions. [2023-11-29 04:14:08,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 254 transitions. [2023-11-29 04:14:08,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:14:08,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 254 transitions. [2023-11-29 04:14:08,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 12.095238095238095) internal successors, (254), 21 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:08,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:08,957 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 27.0) internal successors, (594), 22 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:08,957 INFO L175 Difference]: Start difference. First operand has 430 places, 1160 transitions, 29519 flow. Second operand 21 states and 254 transitions. [2023-11-29 04:14:08,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1383 transitions, 36157 flow [2023-11-29 04:14:15,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1383 transitions, 35910 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 04:14:15,911 INFO L231 Difference]: Finished difference. Result has 459 places, 1272 transitions, 33483 flow [2023-11-29 04:14:15,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=29272, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=33483, PETRI_PLACES=459, PETRI_TRANSITIONS=1272} [2023-11-29 04:14:15,912 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 429 predicate places. [2023-11-29 04:14:15,912 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1272 transitions, 33483 flow [2023-11-29 04:14:15,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:15,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:14:15,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:14:15,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:14:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:16,113 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:14:16,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 147468558, now seen corresponding path program 15 times [2023-11-29 04:14:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:16,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27588155] [2023-11-29 04:14:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27588155] [2023-11-29 04:14:16,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27588155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:14:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531879483] [2023-11-29 04:14:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:14:16,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:14:16,209 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:14:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:14:16,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:14:16,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:14:16,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:14:16,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:14:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:16,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:14:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531879483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:14:16,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:14:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2023-11-29 04:14:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338470057] [2023-11-29 04:14:16,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:14:16,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:14:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:14:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:14:16,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:14:16,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1272 transitions, 33483 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:16,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:16,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:14:16,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:14:24,772 INFO L124 PetriNetUnfolderBase]: 9534/14851 cut-off events. [2023-11-29 04:14:24,772 INFO L125 PetriNetUnfolderBase]: For 859817/859817 co-relation queries the response was YES. [2023-11-29 04:14:24,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171418 conditions, 14851 events. 9534/14851 cut-off events. For 859817/859817 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 99134 event pairs, 2060 based on Foata normal form. 52/14903 useless extension candidates. Maximal degree in co-relation 170831. Up to 11403 conditions per place. [2023-11-29 04:14:25,092 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 924 selfloop transitions, 532 changer transitions 0/1457 dead transitions. [2023-11-29 04:14:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1457 transitions, 39661 flow [2023-11-29 04:14:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:14:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 04:14:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 228 transitions. [2023-11-29 04:14:25,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-11-29 04:14:25,093 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 228 transitions. [2023-11-29 04:14:25,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 228 transitions. [2023-11-29 04:14:25,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:14:25,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 228 transitions. [2023-11-29 04:14:25,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.666666666666666) internal successors, (228), 18 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:25,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 27.0) internal successors, (513), 19 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:25,095 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 27.0) internal successors, (513), 19 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:25,095 INFO L175 Difference]: Start difference. First operand has 459 places, 1272 transitions, 33483 flow. Second operand 18 states and 228 transitions. [2023-11-29 04:14:25,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1457 transitions, 39661 flow [2023-11-29 04:14:33,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1457 transitions, 38759 flow, removed 326 selfloop flow, removed 4 redundant places. [2023-11-29 04:14:33,641 INFO L231 Difference]: Finished difference. Result has 479 places, 1337 transitions, 35730 flow [2023-11-29 04:14:33,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=32665, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=35730, PETRI_PLACES=479, PETRI_TRANSITIONS=1337} [2023-11-29 04:14:33,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 449 predicate places. [2023-11-29 04:14:33,643 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1337 transitions, 35730 flow [2023-11-29 04:14:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:14:33,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:14:33,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:14:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 04:14:33,843 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:14:33,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1851234203, now seen corresponding path program 26 times [2023-11-29 04:14:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090823860] [2023-11-29 04:14:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090823860] [2023-11-29 04:14:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090823860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:14:33,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:14:33,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:14:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581506901] [2023-11-29 04:14:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:14:33,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:14:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:14:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:14:33,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:14:33,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1337 transitions, 35730 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:33,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:33,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:14:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:14:42,214 INFO L124 PetriNetUnfolderBase]: 9477/14719 cut-off events. [2023-11-29 04:14:42,214 INFO L125 PetriNetUnfolderBase]: For 930081/930081 co-relation queries the response was YES. [2023-11-29 04:14:42,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174923 conditions, 14719 events. 9477/14719 cut-off events. For 930081/930081 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 97507 event pairs, 2436 based on Foata normal form. 46/14765 useless extension candidates. Maximal degree in co-relation 174415. Up to 12871 conditions per place. [2023-11-29 04:14:42,665 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1091 selfloop transitions, 344 changer transitions 0/1436 dead transitions. [2023-11-29 04:14:42,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1436 transitions, 40306 flow [2023-11-29 04:14:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:14:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:14:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2023-11-29 04:14:42,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-29 04:14:42,667 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 99 transitions. [2023-11-29 04:14:42,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 99 transitions. [2023-11-29 04:14:42,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:14:42,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 99 transitions. [2023-11-29 04:14:42,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:42,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:42,668 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:42,668 INFO L175 Difference]: Start difference. First operand has 479 places, 1337 transitions, 35730 flow. Second operand 7 states and 99 transitions. [2023-11-29 04:14:42,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1436 transitions, 40306 flow [2023-11-29 04:14:51,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1436 transitions, 38896 flow, removed 363 selfloop flow, removed 10 redundant places. [2023-11-29 04:14:51,234 INFO L231 Difference]: Finished difference. Result has 476 places, 1342 transitions, 35318 flow [2023-11-29 04:14:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34410, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=35318, PETRI_PLACES=476, PETRI_TRANSITIONS=1342} [2023-11-29 04:14:51,235 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 446 predicate places. [2023-11-29 04:14:51,235 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1342 transitions, 35318 flow [2023-11-29 04:14:51,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:51,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:14:51,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:14:51,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-11-29 04:14:51,236 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:14:51,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 541055009, now seen corresponding path program 27 times [2023-11-29 04:14:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789164574] [2023-11-29 04:14:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:14:51,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:51,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789164574] [2023-11-29 04:14:51,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789164574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:14:51,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:14:51,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:14:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207876029] [2023-11-29 04:14:51,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:14:51,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:14:51,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:14:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:14:51,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:14:51,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1342 transitions, 35318 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:51,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:51,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:14:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:14:59,334 INFO L124 PetriNetUnfolderBase]: 9493/14747 cut-off events. [2023-11-29 04:14:59,334 INFO L125 PetriNetUnfolderBase]: For 907961/907961 co-relation queries the response was YES. [2023-11-29 04:14:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173992 conditions, 14747 events. 9493/14747 cut-off events. For 907961/907961 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 97771 event pairs, 2629 based on Foata normal form. 12/14759 useless extension candidates. Maximal degree in co-relation 173487. Up to 13840 conditions per place. [2023-11-29 04:14:59,654 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1169 selfloop transitions, 197 changer transitions 0/1367 dead transitions. [2023-11-29 04:14:59,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1367 transitions, 38384 flow [2023-11-29 04:14:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:14:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:14:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-29 04:14:59,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-29 04:14:59,656 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-29 04:14:59,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-29 04:14:59,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:14:59,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-29 04:14:59,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:59,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:59,657 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:59,657 INFO L175 Difference]: Start difference. First operand has 476 places, 1342 transitions, 35318 flow. Second operand 7 states and 88 transitions. [2023-11-29 04:14:59,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1367 transitions, 38384 flow [2023-11-29 04:15:08,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1367 transitions, 37678 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-29 04:15:08,438 INFO L231 Difference]: Finished difference. Result has 478 places, 1345 transitions, 35115 flow [2023-11-29 04:15:08,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34612, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=35115, PETRI_PLACES=478, PETRI_TRANSITIONS=1345} [2023-11-29 04:15:08,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 448 predicate places. [2023-11-29 04:15:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1345 transitions, 35115 flow [2023-11-29 04:15:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:15:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:08,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-11-29 04:15:08,440 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:15:08,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1571373621, now seen corresponding path program 28 times [2023-11-29 04:15:08,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:08,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824668446] [2023-11-29 04:15:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:08,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:08,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824668446] [2023-11-29 04:15:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824668446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:15:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:15:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:15:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38794380] [2023-11-29 04:15:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:15:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:15:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:15:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:15:08,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:15:08,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1345 transitions, 35115 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:08,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:15:08,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:15:08,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:15:16,345 INFO L124 PetriNetUnfolderBase]: 9476/14688 cut-off events. [2023-11-29 04:15:16,345 INFO L125 PetriNetUnfolderBase]: For 903444/903444 co-relation queries the response was YES. [2023-11-29 04:15:16,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172807 conditions, 14688 events. 9476/14688 cut-off events. For 903444/903444 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 96903 event pairs, 2620 based on Foata normal form. 12/14700 useless extension candidates. Maximal degree in co-relation 172301. Up to 13785 conditions per place. [2023-11-29 04:15:16,692 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1175 selfloop transitions, 195 changer transitions 0/1371 dead transitions. [2023-11-29 04:15:16,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1371 transitions, 38122 flow [2023-11-29 04:15:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:15:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:15:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-29 04:15:16,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-11-29 04:15:16,693 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-29 04:15:16,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-29 04:15:16,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:15:16,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-29 04:15:16,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:16,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:16,694 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:16,694 INFO L175 Difference]: Start difference. First operand has 478 places, 1345 transitions, 35115 flow. Second operand 7 states and 86 transitions. [2023-11-29 04:15:16,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1371 transitions, 38122 flow [2023-11-29 04:15:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1371 transitions, 37716 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 04:15:25,689 INFO L231 Difference]: Finished difference. Result has 480 places, 1343 transitions, 35066 flow [2023-11-29 04:15:25,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34666, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=35066, PETRI_PLACES=480, PETRI_TRANSITIONS=1343} [2023-11-29 04:15:25,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2023-11-29 04:15:25,690 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1343 transitions, 35066 flow [2023-11-29 04:15:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:15:25,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:25,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-11-29 04:15:25,690 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:15:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1029669841, now seen corresponding path program 7 times [2023-11-29 04:15:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879965143] [2023-11-29 04:15:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879965143] [2023-11-29 04:15:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879965143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:15:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775241748] [2023-11-29 04:15:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:15:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:25,803 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:25,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:15:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:25,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:15:25,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:25,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775241748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:26,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:15:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 04:15:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097655751] [2023-11-29 04:15:26,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:15:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:15:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:15:26,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:15:26,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1343 transitions, 35066 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:26,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:15:26,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:15:26,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:15:35,478 INFO L124 PetriNetUnfolderBase]: 10746/16578 cut-off events. [2023-11-29 04:15:35,478 INFO L125 PetriNetUnfolderBase]: For 1052325/1052325 co-relation queries the response was YES. [2023-11-29 04:15:35,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197280 conditions, 16578 events. 10746/16578 cut-off events. For 1052325/1052325 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 110537 event pairs, 2099 based on Foata normal form. 8/16586 useless extension candidates. Maximal degree in co-relation 196725. Up to 8494 conditions per place. [2023-11-29 04:15:35,961 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1040 selfloop transitions, 493 changer transitions 0/1534 dead transitions. [2023-11-29 04:15:35,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1534 transitions, 42460 flow [2023-11-29 04:15:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:15:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 04:15:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 166 transitions. [2023-11-29 04:15:35,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2023-11-29 04:15:35,962 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 166 transitions. [2023-11-29 04:15:35,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 166 transitions. [2023-11-29 04:15:35,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:15:35,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 166 transitions. [2023-11-29 04:15:35,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:35,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:35,963 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:35,963 INFO L175 Difference]: Start difference. First operand has 480 places, 1343 transitions, 35066 flow. Second operand 13 states and 166 transitions. [2023-11-29 04:15:35,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1534 transitions, 42460 flow [2023-11-29 04:15:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1534 transitions, 42027 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-29 04:15:46,057 INFO L231 Difference]: Finished difference. Result has 495 places, 1387 transitions, 37685 flow [2023-11-29 04:15:46,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34667, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=37685, PETRI_PLACES=495, PETRI_TRANSITIONS=1387} [2023-11-29 04:15:46,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 465 predicate places. [2023-11-29 04:15:46,058 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1387 transitions, 37685 flow [2023-11-29 04:15:46,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:15:46,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:46,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:15:46,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:46,259 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:15:46,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash -995841766, now seen corresponding path program 16 times [2023-11-29 04:15:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:46,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457511955] [2023-11-29 04:15:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:46,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457511955] [2023-11-29 04:15:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457511955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:15:46,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:15:46,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:15:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941421621] [2023-11-29 04:15:46,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:15:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:15:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:15:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:15:46,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:15:46,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1387 transitions, 37685 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:46,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:15:46,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:15:46,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:15:55,852 INFO L124 PetriNetUnfolderBase]: 10765/16598 cut-off events. [2023-11-29 04:15:55,852 INFO L125 PetriNetUnfolderBase]: For 1110594/1110594 co-relation queries the response was YES. [2023-11-29 04:15:56,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202534 conditions, 16598 events. 10765/16598 cut-off events. For 1110594/1110594 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 110484 event pairs, 2928 based on Foata normal form. 46/16644 useless extension candidates. Maximal degree in co-relation 201973. Up to 15267 conditions per place. [2023-11-29 04:15:56,276 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1176 selfloop transitions, 254 changer transitions 0/1431 dead transitions. [2023-11-29 04:15:56,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1431 transitions, 41406 flow [2023-11-29 04:15:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:15:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:15:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2023-11-29 04:15:56,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2023-11-29 04:15:56,278 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 94 transitions. [2023-11-29 04:15:56,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 94 transitions. [2023-11-29 04:15:56,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:15:56,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 94 transitions. [2023-11-29 04:15:56,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:56,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:56,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:15:56,279 INFO L175 Difference]: Start difference. First operand has 495 places, 1387 transitions, 37685 flow. Second operand 7 states and 94 transitions. [2023-11-29 04:15:56,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1431 transitions, 41406 flow [2023-11-29 04:16:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1431 transitions, 41182 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-29 04:16:07,980 INFO L231 Difference]: Finished difference. Result has 499 places, 1401 transitions, 38577 flow [2023-11-29 04:16:07,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=37409, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38577, PETRI_PLACES=499, PETRI_TRANSITIONS=1401} [2023-11-29 04:16:07,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 469 predicate places. [2023-11-29 04:16:07,982 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1401 transitions, 38577 flow [2023-11-29 04:16:07,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:07,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:16:07,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:16:07,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-11-29 04:16:07,982 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:16:07,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:16:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1644492461, now seen corresponding path program 29 times [2023-11-29 04:16:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:16:07,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988091796] [2023-11-29 04:16:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:16:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:16:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:16:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:16:08,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:16:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988091796] [2023-11-29 04:16:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988091796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:16:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336978337] [2023-11-29 04:16:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:16:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:16:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:16:08,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:16:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:16:08,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:16:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:16:08,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:16:08,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:16:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:16:08,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:16:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:16:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336978337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:16:08,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:16:08,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 12 [2023-11-29 04:16:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258057078] [2023-11-29 04:16:08,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:16:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:16:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:16:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:16:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:16:08,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:16:08,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1401 transitions, 38577 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:08,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:16:08,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:16:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:16:18,206 INFO L124 PetriNetUnfolderBase]: 10815/16622 cut-off events. [2023-11-29 04:16:18,206 INFO L125 PetriNetUnfolderBase]: For 1113433/1113433 co-relation queries the response was YES. [2023-11-29 04:16:18,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204649 conditions, 16622 events. 10815/16622 cut-off events. For 1113433/1113433 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 110567 event pairs, 2230 based on Foata normal form. 20/16642 useless extension candidates. Maximal degree in co-relation 204085. Up to 12929 conditions per place. [2023-11-29 04:16:18,624 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 861 selfloop transitions, 651 changer transitions 0/1513 dead transitions. [2023-11-29 04:16:18,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1513 transitions, 43521 flow [2023-11-29 04:16:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:16:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:16:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2023-11-29 04:16:18,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2023-11-29 04:16:18,626 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 157 transitions. [2023-11-29 04:16:18,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 157 transitions. [2023-11-29 04:16:18,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:16:18,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 157 transitions. [2023-11-29 04:16:18,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 12 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:18,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:18,627 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:18,628 INFO L175 Difference]: Start difference. First operand has 499 places, 1401 transitions, 38577 flow. Second operand 12 states and 157 transitions. [2023-11-29 04:16:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1513 transitions, 43521 flow [2023-11-29 04:16:31,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1513 transitions, 43133 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-29 04:16:31,166 INFO L231 Difference]: Finished difference. Result has 510 places, 1431 transitions, 40831 flow [2023-11-29 04:16:31,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=38103, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=40831, PETRI_PLACES=510, PETRI_TRANSITIONS=1431} [2023-11-29 04:16:31,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 480 predicate places. [2023-11-29 04:16:31,167 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1431 transitions, 40831 flow [2023-11-29 04:16:31,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:31,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:16:31,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:16:31,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:16:31,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:16:31,368 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:16:31,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:16:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash 718750773, now seen corresponding path program 30 times [2023-11-29 04:16:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:16:31,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779488290] [2023-11-29 04:16:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:16:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:16:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:16:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:16:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:16:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779488290] [2023-11-29 04:16:31,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779488290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:16:31,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:16:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:16:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871847625] [2023-11-29 04:16:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:16:31,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:16:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:16:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:16:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:16:31,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:16:31,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1431 transitions, 40831 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:31,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:16:31,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:16:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:16:41,485 INFO L124 PetriNetUnfolderBase]: 10813/16620 cut-off events. [2023-11-29 04:16:41,486 INFO L125 PetriNetUnfolderBase]: For 1152158/1152158 co-relation queries the response was YES. [2023-11-29 04:16:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209213 conditions, 16620 events. 10813/16620 cut-off events. For 1152158/1152158 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 110265 event pairs, 2939 based on Foata normal form. 2/16622 useless extension candidates. Maximal degree in co-relation 208593. Up to 15606 conditions per place. [2023-11-29 04:16:41,896 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1225 selfloop transitions, 217 changer transitions 2/1445 dead transitions. [2023-11-29 04:16:41,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1445 transitions, 43812 flow [2023-11-29 04:16:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:16:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:16:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-29 04:16:41,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 04:16:41,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-29 04:16:41,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-29 04:16:41,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:16:41,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-29 04:16:41,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:41,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:41,899 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:41,899 INFO L175 Difference]: Start difference. First operand has 510 places, 1431 transitions, 40831 flow. Second operand 7 states and 84 transitions. [2023-11-29 04:16:41,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1445 transitions, 43812 flow [2023-11-29 04:16:54,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1445 transitions, 43392 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-11-29 04:16:54,295 INFO L231 Difference]: Finished difference. Result has 513 places, 1429 transitions, 40781 flow [2023-11-29 04:16:54,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=40358, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=40781, PETRI_PLACES=513, PETRI_TRANSITIONS=1429} [2023-11-29 04:16:54,296 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 483 predicate places. [2023-11-29 04:16:54,296 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1429 transitions, 40781 flow [2023-11-29 04:16:54,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:54,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:16:54,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:16:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-11-29 04:16:54,297 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:16:54,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:16:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash -496056869, now seen corresponding path program 31 times [2023-11-29 04:16:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:16:54,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449846512] [2023-11-29 04:16:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:16:54,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:16:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:16:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:16:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:16:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449846512] [2023-11-29 04:16:54,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449846512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:16:54,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:16:54,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:16:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844477826] [2023-11-29 04:16:54,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:16:54,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:16:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:16:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:16:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:16:54,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:16:54,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1429 transitions, 40781 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:16:54,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:16:54,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:16:54,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:17:05,047 INFO L124 PetriNetUnfolderBase]: 11075/17209 cut-off events. [2023-11-29 04:17:05,047 INFO L125 PetriNetUnfolderBase]: For 1167433/1167433 co-relation queries the response was YES. [2023-11-29 04:17:05,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215738 conditions, 17209 events. 11075/17209 cut-off events. For 1167433/1167433 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 116762 event pairs, 979 based on Foata normal form. 44/17253 useless extension candidates. Maximal degree in co-relation 215117. Up to 5385 conditions per place. [2023-11-29 04:17:05,484 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 904 selfloop transitions, 902 changer transitions 4/1811 dead transitions. [2023-11-29 04:17:05,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1811 transitions, 54387 flow [2023-11-29 04:17:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:17:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:17:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2023-11-29 04:17:05,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-11-29 04:17:05,485 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 148 transitions. [2023-11-29 04:17:05,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 148 transitions. [2023-11-29 04:17:05,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:17:05,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 148 transitions. [2023-11-29 04:17:05,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:05,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:05,486 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:05,487 INFO L175 Difference]: Start difference. First operand has 513 places, 1429 transitions, 40781 flow. Second operand 10 states and 148 transitions. [2023-11-29 04:17:05,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1811 transitions, 54387 flow [2023-11-29 04:17:19,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1811 transitions, 53953 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 04:17:19,905 INFO L231 Difference]: Finished difference. Result has 525 places, 1535 transitions, 47433 flow [2023-11-29 04:17:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=40455, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=47433, PETRI_PLACES=525, PETRI_TRANSITIONS=1535} [2023-11-29 04:17:19,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 495 predicate places. [2023-11-29 04:17:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1535 transitions, 47433 flow [2023-11-29 04:17:19,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:19,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:17:19,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:17:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-11-29 04:17:19,907 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:17:19,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 605361191, now seen corresponding path program 32 times [2023-11-29 04:17:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:19,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463332126] [2023-11-29 04:17:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:20,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463332126] [2023-11-29 04:17:20,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463332126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448555377] [2023-11-29 04:17:20,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:17:20,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:20,006 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:20,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:17:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:17:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:20,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:17:20,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:20,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448555377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:20,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:20,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-29 04:17:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965486762] [2023-11-29 04:17:20,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:17:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:17:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:17:20,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:17:20,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1535 transitions, 47433 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:20,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:17:20,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:17:20,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:17:35,728 INFO L124 PetriNetUnfolderBase]: 13721/21114 cut-off events. [2023-11-29 04:17:35,728 INFO L125 PetriNetUnfolderBase]: For 1697637/1697637 co-relation queries the response was YES. [2023-11-29 04:17:36,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284090 conditions, 21114 events. 13721/21114 cut-off events. For 1697637/1697637 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 145923 event pairs, 1434 based on Foata normal form. 60/21174 useless extension candidates. Maximal degree in co-relation 283300. Up to 7723 conditions per place. [2023-11-29 04:17:36,348 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 923 selfloop transitions, 1184 changer transitions 0/2108 dead transitions. [2023-11-29 04:17:36,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2108 transitions, 66878 flow [2023-11-29 04:17:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:17:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 04:17:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 371 transitions. [2023-11-29 04:17:36,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089163237311386 [2023-11-29 04:17:36,350 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 371 transitions. [2023-11-29 04:17:36,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 371 transitions. [2023-11-29 04:17:36,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:17:36,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 371 transitions. [2023-11-29 04:17:36,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 13.74074074074074) internal successors, (371), 27 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:36,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 27.0) internal successors, (756), 28 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:36,353 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 27.0) internal successors, (756), 28 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:36,353 INFO L175 Difference]: Start difference. First operand has 525 places, 1535 transitions, 47433 flow. Second operand 27 states and 371 transitions. [2023-11-29 04:17:36,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2108 transitions, 66878 flow [2023-11-29 04:17:58,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 2108 transitions, 65887 flow, removed 491 selfloop flow, removed 2 redundant places. [2023-11-29 04:17:58,904 INFO L231 Difference]: Finished difference. Result has 565 places, 1801 transitions, 59854 flow [2023-11-29 04:17:58,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=47080, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=946, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59854, PETRI_PLACES=565, PETRI_TRANSITIONS=1801} [2023-11-29 04:17:58,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 535 predicate places. [2023-11-29 04:17:58,906 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1801 transitions, 59854 flow [2023-11-29 04:17:58,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:58,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:17:58,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:17:58,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 04:17:59,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 04:17:59,106 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:17:59,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash 987643689, now seen corresponding path program 33 times [2023-11-29 04:17:59,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:59,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383439317] [2023-11-29 04:17:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:59,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:17:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383439317] [2023-11-29 04:17:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383439317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:17:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121859483] [2023-11-29 04:17:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:17:59,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:59,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:59,209 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:59,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:17:59,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:17:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:17:59,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:17:59,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:17:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:59,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:17:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121859483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:59,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:17:59,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-11-29 04:17:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340156062] [2023-11-29 04:17:59,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:17:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:17:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:17:59,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:17:59,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1801 transitions, 59854 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:17:59,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:17:59,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:17:59,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:18:18,742 INFO L124 PetriNetUnfolderBase]: 14913/22845 cut-off events. [2023-11-29 04:18:18,742 INFO L125 PetriNetUnfolderBase]: For 1785904/1785904 co-relation queries the response was YES. [2023-11-29 04:18:19,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313622 conditions, 22845 events. 14913/22845 cut-off events. For 1785904/1785904 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 157493 event pairs, 1928 based on Foata normal form. 118/22963 useless extension candidates. Maximal degree in co-relation 312798. Up to 8300 conditions per place. [2023-11-29 04:18:19,489 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1347 selfloop transitions, 1100 changer transitions 0/2448 dead transitions. [2023-11-29 04:18:19,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2448 transitions, 80794 flow [2023-11-29 04:18:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:18:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 04:18:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 392 transitions. [2023-11-29 04:18:19,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2023-11-29 04:18:19,491 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 392 transitions. [2023-11-29 04:18:19,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 392 transitions. [2023-11-29 04:18:19,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:18:19,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 392 transitions. [2023-11-29 04:18:19,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 12.25) internal successors, (392), 32 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:19,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 27.0) internal successors, (891), 33 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:19,493 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 27.0) internal successors, (891), 33 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:19,494 INFO L175 Difference]: Start difference. First operand has 565 places, 1801 transitions, 59854 flow. Second operand 32 states and 392 transitions. [2023-11-29 04:18:19,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2448 transitions, 80794 flow [2023-11-29 04:18:51,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 2448 transitions, 76304 flow, removed 1391 selfloop flow, removed 8 redundant places. [2023-11-29 04:18:51,089 INFO L231 Difference]: Finished difference. Result has 604 places, 2093 transitions, 69524 flow [2023-11-29 04:18:51,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57153, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=69524, PETRI_PLACES=604, PETRI_TRANSITIONS=2093} [2023-11-29 04:18:51,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 574 predicate places. [2023-11-29 04:18:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 2093 transitions, 69524 flow [2023-11-29 04:18:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:51,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:18:51,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:18:51,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:18:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 04:18:51,292 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:18:51,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:18:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 29174632, now seen corresponding path program 17 times [2023-11-29 04:18:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:18:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307868490] [2023-11-29 04:18:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:18:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:18:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:18:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:18:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:18:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307868490] [2023-11-29 04:18:51,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307868490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:18:51,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:18:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:18:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883427562] [2023-11-29 04:18:51,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:18:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:18:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:18:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:18:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:18:51,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:18:51,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 2093 transitions, 69524 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:18:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:18:51,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:18:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:19:12,949 INFO L124 PetriNetUnfolderBase]: 14862/22799 cut-off events. [2023-11-29 04:19:12,949 INFO L125 PetriNetUnfolderBase]: For 1463217/1463217 co-relation queries the response was YES. [2023-11-29 04:19:13,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305682 conditions, 22799 events. 14862/22799 cut-off events. For 1463217/1463217 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 157725 event pairs, 2576 based on Foata normal form. 68/22867 useless extension candidates. Maximal degree in co-relation 304891. Up to 15481 conditions per place. [2023-11-29 04:19:13,791 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1319 selfloop transitions, 887 changer transitions 10/2217 dead transitions. [2023-11-29 04:19:13,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 2217 transitions, 76676 flow [2023-11-29 04:19:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:19:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:19:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2023-11-29 04:19:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 04:19:13,881 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 91 transitions. [2023-11-29 04:19:13,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 91 transitions. [2023-11-29 04:19:13,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:19:13,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 91 transitions. [2023-11-29 04:19:13,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:19:13,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:19:13,882 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:19:13,882 INFO L175 Difference]: Start difference. First operand has 604 places, 2093 transitions, 69524 flow. Second operand 7 states and 91 transitions. [2023-11-29 04:19:13,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 2217 transitions, 76676 flow [2023-11-29 04:19:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 2217 transitions, 74034 flow, removed 794 selfloop flow, removed 3 redundant places. [2023-11-29 04:19:43,301 INFO L231 Difference]: Finished difference. Result has 610 places, 2102 transitions, 69259 flow [2023-11-29 04:19:43,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=66810, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=69259, PETRI_PLACES=610, PETRI_TRANSITIONS=2102} [2023-11-29 04:19:43,304 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 580 predicate places. [2023-11-29 04:19:43,304 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 2102 transitions, 69259 flow [2023-11-29 04:19:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:19:43,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:19:43,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:19:43,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-11-29 04:19:43,304 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:19:43,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:19:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -621829947, now seen corresponding path program 34 times [2023-11-29 04:19:43,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:19:43,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035556147] [2023-11-29 04:19:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:19:43,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:19:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:19:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:19:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:19:43,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035556147] [2023-11-29 04:19:43,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035556147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:19:43,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:19:43,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:19:43,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979126386] [2023-11-29 04:19:43,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:19:43,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:19:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:19:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:19:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:19:43,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:19:43,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 2102 transitions, 69259 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:19:43,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:19:43,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:19:43,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:04,707 INFO L124 PetriNetUnfolderBase]: 14945/22964 cut-off events. [2023-11-29 04:20:04,707 INFO L125 PetriNetUnfolderBase]: For 1455664/1455664 co-relation queries the response was YES. [2023-11-29 04:20:05,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298671 conditions, 22964 events. 14945/22964 cut-off events. For 1455664/1455664 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 159763 event pairs, 2570 based on Foata normal form. 14/22978 useless extension candidates. Maximal degree in co-relation 298339. Up to 14794 conditions per place. [2023-11-29 04:20:05,490 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1679 selfloop transitions, 586 changer transitions 7/2273 dead transitions. [2023-11-29 04:20:05,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 2273 transitions, 77692 flow [2023-11-29 04:20:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:20:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:20:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2023-11-29 04:20:05,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2023-11-29 04:20:05,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 100 transitions. [2023-11-29 04:20:05,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 100 transitions. [2023-11-29 04:20:05,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:05,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 100 transitions. [2023-11-29 04:20:05,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:05,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:05,493 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:05,493 INFO L175 Difference]: Start difference. First operand has 610 places, 2102 transitions, 69259 flow. Second operand 7 states and 100 transitions. [2023-11-29 04:20:05,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 2273 transitions, 77692 flow [2023-11-29 04:20:32,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 2273 transitions, 75666 flow, removed 85 selfloop flow, removed 5 redundant places. [2023-11-29 04:20:32,206 INFO L231 Difference]: Finished difference. Result has 614 places, 2120 transitions, 69525 flow [2023-11-29 04:20:32,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=67373, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=69525, PETRI_PLACES=614, PETRI_TRANSITIONS=2120} [2023-11-29 04:20:32,208 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2023-11-29 04:20:32,208 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 2120 transitions, 69525 flow [2023-11-29 04:20:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:32,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:32,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-11-29 04:20:32,209 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:20:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash 537799157, now seen corresponding path program 35 times [2023-11-29 04:20:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:32,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512792911] [2023-11-29 04:20:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512792911] [2023-11-29 04:20:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512792911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201734964] [2023-11-29 04:20:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:20:32,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:32,317 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:32,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:20:32,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:20:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:32,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:20:32,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:32,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:32,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201734964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:32,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:32,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2023-11-29 04:20:32,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718980844] [2023-11-29 04:20:32,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:32,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:20:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:20:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:20:32,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:20:32,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 2120 transitions, 69525 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:32,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:32,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:20:32,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:55,239 INFO L124 PetriNetUnfolderBase]: 15625/24354 cut-off events. [2023-11-29 04:20:55,239 INFO L125 PetriNetUnfolderBase]: For 1451084/1451084 co-relation queries the response was YES. [2023-11-29 04:20:55,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310276 conditions, 24354 events. 15625/24354 cut-off events. For 1451084/1451084 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 175084 event pairs, 1476 based on Foata normal form. 32/24386 useless extension candidates. Maximal degree in co-relation 309803. Up to 7378 conditions per place. [2023-11-29 04:20:56,168 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1293 selfloop transitions, 1252 changer transitions 0/2546 dead transitions. [2023-11-29 04:20:56,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 2546 transitions, 84299 flow [2023-11-29 04:20:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:20:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 04:20:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2023-11-29 04:20:56,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589225589225589 [2023-11-29 04:20:56,169 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 166 transitions. [2023-11-29 04:20:56,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 166 transitions. [2023-11-29 04:20:56,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:56,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 166 transitions. [2023-11-29 04:20:56,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.090909090909092) internal successors, (166), 11 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:56,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:56,171 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:56,171 INFO L175 Difference]: Start difference. First operand has 614 places, 2120 transitions, 69525 flow. Second operand 11 states and 166 transitions. [2023-11-29 04:20:56,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 2546 transitions, 84299 flow [2023-11-29 04:21:25,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 2546 transitions, 83168 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-11-29 04:21:25,891 INFO L231 Difference]: Finished difference. Result has 623 places, 2192 transitions, 74403 flow [2023-11-29 04:21:25,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68565, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=74403, PETRI_PLACES=623, PETRI_TRANSITIONS=2192} [2023-11-29 04:21:25,893 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 593 predicate places. [2023-11-29 04:21:25,893 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 2192 transitions, 74403 flow [2023-11-29 04:21:25,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:25,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:25,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:25,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:21:26,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2869b06e-69f4-4975-949b-fc6a0fc040f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:26,094 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:21:26,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1521016033, now seen corresponding path program 36 times [2023-11-29 04:21:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:26,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249222981] [2023-11-29 04:21:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:26,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249222981] [2023-11-29 04:21:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249222981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:21:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868023437] [2023-11-29 04:21:26,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:21:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:21:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:21:26,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-29 04:21:26,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 2192 transitions, 74403 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:26,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:26,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-29 04:21:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:48,963 INFO L124 PetriNetUnfolderBase]: 15769/24726 cut-off events. [2023-11-29 04:21:48,963 INFO L125 PetriNetUnfolderBase]: For 1615812/1615812 co-relation queries the response was YES. [2023-11-29 04:21:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320493 conditions, 24726 events. 15769/24726 cut-off events. For 1615812/1615812 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 180000 event pairs, 3400 based on Foata normal form. 44/24770 useless extension candidates. Maximal degree in co-relation 319707. Up to 20535 conditions per place. [2023-11-29 04:21:49,594 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1637 selfloop transitions, 694 changer transitions 5/2337 dead transitions. [2023-11-29 04:21:49,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 2337 transitions, 82260 flow [2023-11-29 04:21:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:21:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:21:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2023-11-29 04:21:49,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 04:21:49,595 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 93 transitions. [2023-11-29 04:21:49,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 93 transitions. [2023-11-29 04:21:49,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:49,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 93 transitions. [2023-11-29 04:21:49,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,596 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,596 INFO L175 Difference]: Start difference. First operand has 623 places, 2192 transitions, 74403 flow. Second operand 7 states and 93 transitions. [2023-11-29 04:21:49,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 2337 transitions, 82260 flow