./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/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_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/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_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/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 d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:26:23,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:26:23,126 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:26:23,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:26:23,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:26:23,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:26:23,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:26:23,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:26:23,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:26:23,159 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:26:23,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:26:23,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:26:23,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:26:23,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:26:23,162 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:26:23,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:26:23,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:26:23,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:26:23,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:26:23,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:26:23,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:26:23,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:26:23,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:26:23,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:26:23,166 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:26:23,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:26:23,167 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:26:23,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:26:23,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:26:23,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:26:23,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:26:23,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:26:23,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:26:23,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:26:23,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:26:23,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:26:23,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:26:23,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:26:23,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:26:23,172 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:26:23,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:26:23,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:26:23,173 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_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 [2023-11-29 05:26:23,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:26:23,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:26:23,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:26:23,430 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:26:23,431 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:26:23,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-29 05:26:26,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:26:26,334 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:26:26,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-29 05:26:26,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/data/33e55ef21/eb4fa361db884ebd84109bd3f76c5951/FLAG34550529e [2023-11-29 05:26:26,354 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/data/33e55ef21/eb4fa361db884ebd84109bd3f76c5951 [2023-11-29 05:26:26,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:26:26,358 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:26:26,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:26:26,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:26:26,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:26:26,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f0b159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26, skipping insertion in model container [2023-11-29 05:26:26,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,384 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:26:26,525 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_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/sv-benchmarks/c/weaver/test-easy11.wvr.c[2031,2044] [2023-11-29 05:26:26,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:26:26,538 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:26:26,558 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_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/sv-benchmarks/c/weaver/test-easy11.wvr.c[2031,2044] [2023-11-29 05:26:26,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:26:26,567 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:26:26,567 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:26:26,574 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:26:26,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26 WrapperNode [2023-11-29 05:26:26,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:26:26,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:26:26,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:26:26,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:26:26,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,601 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-29 05:26:26,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:26:26,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:26:26,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:26:26,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:26:26,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,613 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,625 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 05:26:26,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:26:26,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:26:26,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:26:26,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:26:26,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (1/1) ... [2023-11-29 05:26:26,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:26:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:26,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:26:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:26:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:26:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:26:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:26:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:26:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:26:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:26:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:26:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:26:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:26:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:26:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:26:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:26:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:26:26,706 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 05:26:26,798 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:26:26,800 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:26:26,932 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:26:27,035 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:26:27,036 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 05:26:27,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:26:27 BoogieIcfgContainer [2023-11-29 05:26:27,036 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:26:27,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:26:27,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:26:27,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:26:27,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:26:26" (1/3) ... [2023-11-29 05:26:27,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ee3d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:26:27, skipping insertion in model container [2023-11-29 05:26:27,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:26:26" (2/3) ... [2023-11-29 05:26:27,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ee3d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:26:27, skipping insertion in model container [2023-11-29 05:26:27,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:26:27" (3/3) ... [2023-11-29 05:26:27,046 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-11-29 05:26:27,054 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:26:27,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:26:27,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:26:27,063 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:26:27,099 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:26:27,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 05:26:27,152 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-29 05:26:27,152 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:26:27,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-29 05:26:27,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 05:26:27,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-29 05:26:27,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:26:27,175 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;@4273cf0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:26:27,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 05:26:27,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:26:27,186 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-29 05:26:27,187 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:26:27,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:27,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:27,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:27,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1169459314, now seen corresponding path program 1 times [2023-11-29 05:26:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:27,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140523320] [2023-11-29 05:26:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:27,744 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 05:26:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:27,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140523320] [2023-11-29 05:26:27,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140523320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:27,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:27,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883603693] [2023-11-29 05:26:27,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:27,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:27,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:27,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:27,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:27,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:28,101 INFO L124 PetriNetUnfolderBase]: 114/209 cut-off events. [2023-11-29 05:26:28,102 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-29 05:26:28,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 209 events. 114/209 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 580 event pairs, 22 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 364. Up to 81 conditions per place. [2023-11-29 05:26:28,107 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 35 selfloop transitions, 10 changer transitions 10/56 dead transitions. [2023-11-29 05:26:28,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 243 flow [2023-11-29 05:26:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2023-11-29 05:26:28,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40096618357487923 [2023-11-29 05:26:28,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 83 transitions. [2023-11-29 05:26:28,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 83 transitions. [2023-11-29 05:26:28,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:28,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 83 transitions. [2023-11-29 05:26:28,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,132 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 9 states and 83 transitions. [2023-11-29 05:26:28,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 243 flow [2023-11-29 05:26:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:28,138 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 109 flow [2023-11-29 05:26:28,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=109, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-29 05:26:28,144 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-11-29 05:26:28,144 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 109 flow [2023-11-29 05:26:28,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:28,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:28,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:28,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:26:28,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:28,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash -711563540, now seen corresponding path program 2 times [2023-11-29 05:26:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:28,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416869873] [2023-11-29 05:26:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:28,353 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 05:26:28,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416869873] [2023-11-29 05:26:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416869873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:28,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:28,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726242927] [2023-11-29 05:26:28,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:28,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:28,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:28,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:28,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:28,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:28,685 INFO L124 PetriNetUnfolderBase]: 124/227 cut-off events. [2023-11-29 05:26:28,685 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-11-29 05:26:28,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 227 events. 124/227 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 717 event pairs, 4 based on Foata normal form. 1/216 useless extension candidates. Maximal degree in co-relation 595. Up to 69 conditions per place. [2023-11-29 05:26:28,689 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 44 selfloop transitions, 12 changer transitions 12/69 dead transitions. [2023-11-29 05:26:28,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 367 flow [2023-11-29 05:26:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2023-11-29 05:26:28,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2023-11-29 05:26:28,692 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 93 transitions. [2023-11-29 05:26:28,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 93 transitions. [2023-11-29 05:26:28,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:28,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 93 transitions. [2023-11-29 05:26:28,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 05:26:28,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,695 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,696 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 109 flow. Second operand 9 states and 93 transitions. [2023-11-29 05:26:28,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 367 flow [2023-11-29 05:26:28,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 358 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 05:26:28,700 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 155 flow [2023-11-29 05:26:28,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=155, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-11-29 05:26:28,701 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-29 05:26:28,701 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 155 flow [2023-11-29 05:26:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:28,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:26:28,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:28,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash 704347494, now seen corresponding path program 3 times [2023-11-29 05:26:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565621255] [2023-11-29 05:26:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:28,881 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 05:26:28,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:28,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565621255] [2023-11-29 05:26:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565621255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:28,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:28,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644320640] [2023-11-29 05:26:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:28,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:28,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:28,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:28,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:28,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:28,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:28,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:29,139 INFO L124 PetriNetUnfolderBase]: 126/233 cut-off events. [2023-11-29 05:26:29,139 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-11-29 05:26:29,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 233 events. 126/233 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 706 event pairs, 18 based on Foata normal form. 1/234 useless extension candidates. Maximal degree in co-relation 704. Up to 135 conditions per place. [2023-11-29 05:26:29,142 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 36 selfloop transitions, 14 changer transitions 12/63 dead transitions. [2023-11-29 05:26:29,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 63 transitions, 401 flow [2023-11-29 05:26:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-29 05:26:29,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41545893719806765 [2023-11-29 05:26:29,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-29 05:26:29,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-29 05:26:29,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:29,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-29 05:26:29,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 05:26:29,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,148 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,148 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 155 flow. Second operand 9 states and 86 transitions. [2023-11-29 05:26:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 63 transitions, 401 flow [2023-11-29 05:26:29,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 358 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:29,153 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 202 flow [2023-11-29 05:26:29,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-29 05:26:29,154 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2023-11-29 05:26:29,154 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 202 flow [2023-11-29 05:26:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:29,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:29,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:29,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:26:29,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1681790924, now seen corresponding path program 4 times [2023-11-29 05:26:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393961806] [2023-11-29 05:26:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:29,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:29,309 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 05:26:29,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393961806] [2023-11-29 05:26:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393961806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395713233] [2023-11-29 05:26:29,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:29,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:29,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:29,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:29,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:29,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:29,574 INFO L124 PetriNetUnfolderBase]: 130/239 cut-off events. [2023-11-29 05:26:29,574 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-29 05:26:29,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 239 events. 130/239 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 749 event pairs, 16 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 739. Up to 139 conditions per place. [2023-11-29 05:26:29,577 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 41 selfloop transitions, 18 changer transitions 10/70 dead transitions. [2023-11-29 05:26:29,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 470 flow [2023-11-29 05:26:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:26:29,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:26:29,580 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:26:29,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:26:29,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:29,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:26:29,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:26:29,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,583 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,583 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 202 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:26:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 470 flow [2023-11-29 05:26:29,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 422 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:29,587 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 256 flow [2023-11-29 05:26:29,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-11-29 05:26:29,588 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2023-11-29 05:26:29,589 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 256 flow [2023-11-29 05:26:29,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:29,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:29,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:26:29,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:29,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1110819316, now seen corresponding path program 5 times [2023-11-29 05:26:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:29,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021681907] [2023-11-29 05:26:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:29,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:29,725 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 05:26:29,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:29,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021681907] [2023-11-29 05:26:29,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021681907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:29,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:29,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192669847] [2023-11-29 05:26:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:29,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:29,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 256 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:29,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:29,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:29,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:29,957 INFO L124 PetriNetUnfolderBase]: 153/274 cut-off events. [2023-11-29 05:26:29,958 INFO L125 PetriNetUnfolderBase]: For 454/454 co-relation queries the response was YES. [2023-11-29 05:26:29,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 274 events. 153/274 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 859 event pairs, 26 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 943. Up to 149 conditions per place. [2023-11-29 05:26:29,961 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 38 selfloop transitions, 26 changer transitions 12/77 dead transitions. [2023-11-29 05:26:29,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 592 flow [2023-11-29 05:26:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2023-11-29 05:26:29,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2023-11-29 05:26:29,963 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 89 transitions. [2023-11-29 05:26:29,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 89 transitions. [2023-11-29 05:26:29,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:29,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 89 transitions. [2023-11-29 05:26:29,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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 05:26:29,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,965 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,965 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 256 flow. Second operand 9 states and 89 transitions. [2023-11-29 05:26:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 592 flow [2023-11-29 05:26:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 534 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:29,970 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 394 flow [2023-11-29 05:26:29,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-11-29 05:26:29,971 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-29 05:26:29,971 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 394 flow [2023-11-29 05:26:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:29,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:29,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:29,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:26:29,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:29,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2004193766, now seen corresponding path program 6 times [2023-11-29 05:26:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969359332] [2023-11-29 05:26:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:30,112 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 05:26:30,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:30,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969359332] [2023-11-29 05:26:30,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969359332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:30,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:30,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:30,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533087467] [2023-11-29 05:26:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:30,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:30,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:30,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:30,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:30,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:30,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:30,392 INFO L124 PetriNetUnfolderBase]: 169/302 cut-off events. [2023-11-29 05:26:30,392 INFO L125 PetriNetUnfolderBase]: For 673/673 co-relation queries the response was YES. [2023-11-29 05:26:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 302 events. 169/302 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1033 event pairs, 14 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1137. Up to 157 conditions per place. [2023-11-29 05:26:30,395 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 51 selfloop transitions, 26 changer transitions 12/90 dead transitions. [2023-11-29 05:26:30,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 737 flow [2023-11-29 05:26:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2023-11-29 05:26:30,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45410628019323673 [2023-11-29 05:26:30,397 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 94 transitions. [2023-11-29 05:26:30,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 94 transitions. [2023-11-29 05:26:30,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:30,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 94 transitions. [2023-11-29 05:26:30,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 05:26:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,399 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,399 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 394 flow. Second operand 9 states and 94 transitions. [2023-11-29 05:26:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 737 flow [2023-11-29 05:26:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 688 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:30,404 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 433 flow [2023-11-29 05:26:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=433, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-29 05:26:30,404 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-11-29 05:26:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 433 flow [2023-11-29 05:26:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:30,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:30,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:26:30,406 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:30,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash 929200618, now seen corresponding path program 7 times [2023-11-29 05:26:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9298397] [2023-11-29 05:26:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:30,540 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 05:26:30,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:30,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9298397] [2023-11-29 05:26:30,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9298397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:30,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:30,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597115244] [2023-11-29 05:26:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:30,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:30,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:30,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 433 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:30,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:30,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:30,801 INFO L124 PetriNetUnfolderBase]: 184/325 cut-off events. [2023-11-29 05:26:30,801 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2023-11-29 05:26:30,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 325 events. 184/325 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1106 event pairs, 18 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1345. Up to 183 conditions per place. [2023-11-29 05:26:30,804 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 46 selfloop transitions, 33 changer transitions 10/90 dead transitions. [2023-11-29 05:26:30,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 835 flow [2023-11-29 05:26:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:26:30,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:26:30,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:26:30,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:26:30,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:30,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:26:30,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:26:30,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,808 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,808 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 433 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:26:30,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 835 flow [2023-11-29 05:26:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 761 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:30,816 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 601 flow [2023-11-29 05:26:30,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=601, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-29 05:26:30,817 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2023-11-29 05:26:30,817 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 601 flow [2023-11-29 05:26:30,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:30,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:30,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:30,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:26:30,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:30,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 464045896, now seen corresponding path program 8 times [2023-11-29 05:26:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729321537] [2023-11-29 05:26:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:30,951 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 05:26:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729321537] [2023-11-29 05:26:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729321537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:30,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:30,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641351004] [2023-11-29 05:26:30,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:30,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 601 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:30,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:30,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:30,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:31,211 INFO L124 PetriNetUnfolderBase]: 178/315 cut-off events. [2023-11-29 05:26:31,211 INFO L125 PetriNetUnfolderBase]: For 1129/1129 co-relation queries the response was YES. [2023-11-29 05:26:31,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 315 events. 178/315 cut-off events. For 1129/1129 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1093 event pairs, 16 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1403. Up to 169 conditions per place. [2023-11-29 05:26:31,214 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 53 selfloop transitions, 29 changer transitions 14/97 dead transitions. [2023-11-29 05:26:31,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 959 flow [2023-11-29 05:26:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2023-11-29 05:26:31,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2023-11-29 05:26:31,215 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 89 transitions. [2023-11-29 05:26:31,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 89 transitions. [2023-11-29 05:26:31,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:31,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 89 transitions. [2023-11-29 05:26:31,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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 05:26:31,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:31,217 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:31,217 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 601 flow. Second operand 9 states and 89 transitions. [2023-11-29 05:26:31,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 959 flow [2023-11-29 05:26:31,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 879 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:31,224 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 571 flow [2023-11-29 05:26:31,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-11-29 05:26:31,225 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2023-11-29 05:26:31,225 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 571 flow [2023-11-29 05:26:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:31,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:31,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:26:31,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:31,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1947180834, now seen corresponding path program 9 times [2023-11-29 05:26:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233793022] [2023-11-29 05:26:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:31,345 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 05:26:31,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:31,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233793022] [2023-11-29 05:26:31,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233793022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:31,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:31,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292002748] [2023-11-29 05:26:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:31,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:31,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:31,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:31,603 INFO L124 PetriNetUnfolderBase]: 175/310 cut-off events. [2023-11-29 05:26:31,604 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2023-11-29 05:26:31,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1364 conditions, 310 events. 175/310 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1042 event pairs, 22 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1341. Up to 167 conditions per place. [2023-11-29 05:26:31,607 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 45 selfloop transitions, 32 changer transitions 12/90 dead transitions. [2023-11-29 05:26:31,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 875 flow [2023-11-29 05:26:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2023-11-29 05:26:31,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-11-29 05:26:31,608 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 90 transitions. [2023-11-29 05:26:31,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 90 transitions. [2023-11-29 05:26:31,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:31,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 90 transitions. [2023-11-29 05:26:31,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.0) internal successors, (90), 9 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 05:26:31,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:31,610 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:31,610 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 571 flow. Second operand 9 states and 90 transitions. [2023-11-29 05:26:31,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 875 flow [2023-11-29 05:26:31,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 807 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:31,616 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 616 flow [2023-11-29 05:26:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=616, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-11-29 05:26:31,616 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 45 predicate places. [2023-11-29 05:26:31,617 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 616 flow [2023-11-29 05:26:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:31,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:31,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:26:31,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:31,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1859244100, now seen corresponding path program 10 times [2023-11-29 05:26:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657405525] [2023-11-29 05:26:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:31,735 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 05:26:31,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657405525] [2023-11-29 05:26:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657405525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:31,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:31,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129791920] [2023-11-29 05:26:31,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:31,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:31,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:31,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:31,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 616 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:31,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:31,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:31,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:32,000 INFO L124 PetriNetUnfolderBase]: 191/338 cut-off events. [2023-11-29 05:26:32,001 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-29 05:26:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 338 events. 191/338 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1189 event pairs, 14 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 1461. Up to 175 conditions per place. [2023-11-29 05:26:32,004 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 49 selfloop transitions, 33 changer transitions 12/95 dead transitions. [2023-11-29 05:26:32,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 926 flow [2023-11-29 05:26:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2023-11-29 05:26:32,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45893719806763283 [2023-11-29 05:26:32,005 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 95 transitions. [2023-11-29 05:26:32,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 95 transitions. [2023-11-29 05:26:32,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:32,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 95 transitions. [2023-11-29 05:26:32,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 05:26:32,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,007 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,007 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 616 flow. Second operand 9 states and 95 transitions. [2023-11-29 05:26:32,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 926 flow [2023-11-29 05:26:32,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 856 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:32,014 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 643 flow [2023-11-29 05:26:32,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=643, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-11-29 05:26:32,015 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-29 05:26:32,015 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 643 flow [2023-11-29 05:26:32,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:32,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:26:32,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:32,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 664377442, now seen corresponding path program 11 times [2023-11-29 05:26:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:32,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995674335] [2023-11-29 05:26:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:32,143 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 05:26:32,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995674335] [2023-11-29 05:26:32,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995674335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:32,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:32,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:32,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172652602] [2023-11-29 05:26:32,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:32,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 643 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:32,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:32,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:32,358 INFO L124 PetriNetUnfolderBase]: 179/320 cut-off events. [2023-11-29 05:26:32,358 INFO L125 PetriNetUnfolderBase]: For 1283/1283 co-relation queries the response was YES. [2023-11-29 05:26:32,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 320 events. 179/320 cut-off events. For 1283/1283 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1121 event pairs, 16 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1435. Up to 177 conditions per place. [2023-11-29 05:26:32,361 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 45 selfloop transitions, 30 changer transitions 14/90 dead transitions. [2023-11-29 05:26:32,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 912 flow [2023-11-29 05:26:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:26:32,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:26:32,362 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:32,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:26:32,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,364 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,364 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 643 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:26:32,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 912 flow [2023-11-29 05:26:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 838 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:32,370 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 599 flow [2023-11-29 05:26:32,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=599, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-29 05:26:32,371 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-29 05:26:32,371 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 599 flow [2023-11-29 05:26:32,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:32,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:32,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:26:32,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:32,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1372105332, now seen corresponding path program 12 times [2023-11-29 05:26:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:32,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993228140] [2023-11-29 05:26:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:32,482 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 05:26:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993228140] [2023-11-29 05:26:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993228140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:32,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619383073] [2023-11-29 05:26:32,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:32,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:32,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 599 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:32,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:32,707 INFO L124 PetriNetUnfolderBase]: 186/331 cut-off events. [2023-11-29 05:26:32,707 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2023-11-29 05:26:32,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 331 events. 186/331 cut-off events. For 1274/1274 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1162 event pairs, 14 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1419. Up to 181 conditions per place. [2023-11-29 05:26:32,710 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 47 selfloop transitions, 32 changer transitions 10/90 dead transitions. [2023-11-29 05:26:32,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 891 flow [2023-11-29 05:26:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:26:32,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:26:32,711 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:32,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:26:32,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:26:32,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,713 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:32,713 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 599 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:26:32,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 891 flow [2023-11-29 05:26:32,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 825 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:32,720 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 628 flow [2023-11-29 05:26:32,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=628, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-29 05:26:32,720 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2023-11-29 05:26:32,721 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 628 flow [2023-11-29 05:26:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:32,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:32,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:26:32,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:32,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash -494822686, now seen corresponding path program 13 times [2023-11-29 05:26:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:32,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506411578] [2023-11-29 05:26:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:32,832 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 05:26:32,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506411578] [2023-11-29 05:26:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506411578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:32,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340873954] [2023-11-29 05:26:32,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:32,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:32,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:32,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:32,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 628 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:32,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:32,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:32,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:33,041 INFO L124 PetriNetUnfolderBase]: 178/319 cut-off events. [2023-11-29 05:26:33,041 INFO L125 PetriNetUnfolderBase]: For 1353/1353 co-relation queries the response was YES. [2023-11-29 05:26:33,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 319 events. 178/319 cut-off events. For 1353/1353 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1109 event pairs, 18 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1415. Up to 183 conditions per place. [2023-11-29 05:26:33,045 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 46 selfloop transitions, 28 changer transitions 12/87 dead transitions. [2023-11-29 05:26:33,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 888 flow [2023-11-29 05:26:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2023-11-29 05:26:33,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-11-29 05:26:33,046 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 87 transitions. [2023-11-29 05:26:33,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 87 transitions. [2023-11-29 05:26:33,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:33,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 87 transitions. [2023-11-29 05:26:33,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 05:26:33,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,047 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,048 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 628 flow. Second operand 9 states and 87 transitions. [2023-11-29 05:26:33,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 888 flow [2023-11-29 05:26:33,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 812 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:33,054 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 578 flow [2023-11-29 05:26:33,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=578, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2023-11-29 05:26:33,055 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2023-11-29 05:26:33,055 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 578 flow [2023-11-29 05:26:33,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:33,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:33,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:26:33,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:33,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash 523073994, now seen corresponding path program 14 times [2023-11-29 05:26:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177336915] [2023-11-29 05:26:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:33,184 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 05:26:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177336915] [2023-11-29 05:26:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177336915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:33,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961833803] [2023-11-29 05:26:33,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:33,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:33,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:33,450 INFO L124 PetriNetUnfolderBase]: 177/318 cut-off events. [2023-11-29 05:26:33,450 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2023-11-29 05:26:33,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 318 events. 177/318 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1086 event pairs, 24 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1349. Up to 181 conditions per place. [2023-11-29 05:26:33,453 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 45 selfloop transitions, 30 changer transitions 12/88 dead transitions. [2023-11-29 05:26:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 885 flow [2023-11-29 05:26:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:26:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:26:33,454 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:26:33,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:26:33,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:33,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:26:33,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:26:33,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,456 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,456 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 578 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:26:33,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 885 flow [2023-11-29 05:26:33,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 821 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:33,463 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 622 flow [2023-11-29 05:26:33,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2023-11-29 05:26:33,464 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 52 predicate places. [2023-11-29 05:26:33,464 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 622 flow [2023-11-29 05:26:33,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:33,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:26:33,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:33,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1407769992, now seen corresponding path program 15 times [2023-11-29 05:26:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:33,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029797871] [2023-11-29 05:26:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:33,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:33,575 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 05:26:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029797871] [2023-11-29 05:26:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029797871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:33,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576301147] [2023-11-29 05:26:33,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:33,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:33,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 622 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:33,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:33,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:33,814 INFO L124 PetriNetUnfolderBase]: 185/332 cut-off events. [2023-11-29 05:26:33,814 INFO L125 PetriNetUnfolderBase]: For 1488/1488 co-relation queries the response was YES. [2023-11-29 05:26:33,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 332 events. 185/332 cut-off events. For 1488/1488 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1147 event pairs, 22 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1443. Up to 185 conditions per place. [2023-11-29 05:26:33,818 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 53 selfloop transitions, 27 changer transitions 10/91 dead transitions. [2023-11-29 05:26:33,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 963 flow [2023-11-29 05:26:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:33,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-29 05:26:33,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41545893719806765 [2023-11-29 05:26:33,820 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-29 05:26:33,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-29 05:26:33,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:33,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-29 05:26:33,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 05:26:33,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,822 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,822 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 622 flow. Second operand 9 states and 86 transitions. [2023-11-29 05:26:33,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 963 flow [2023-11-29 05:26:33,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 908 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:33,829 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 654 flow [2023-11-29 05:26:33,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=654, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2023-11-29 05:26:33,830 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 56 predicate places. [2023-11-29 05:26:33,830 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 654 flow [2023-11-29 05:26:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:33,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:33,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:26:33,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:33,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1183228012, now seen corresponding path program 16 times [2023-11-29 05:26:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340332619] [2023-11-29 05:26:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:33,949 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 05:26:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340332619] [2023-11-29 05:26:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340332619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214557260] [2023-11-29 05:26:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:33,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:33,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 654 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:33,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:33,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:33,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:34,174 INFO L124 PetriNetUnfolderBase]: 181/328 cut-off events. [2023-11-29 05:26:34,174 INFO L125 PetriNetUnfolderBase]: For 1593/1593 co-relation queries the response was YES. [2023-11-29 05:26:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 328 events. 181/328 cut-off events. For 1593/1593 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1137 event pairs, 22 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 1459. Up to 195 conditions per place. [2023-11-29 05:26:34,178 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 47 selfloop transitions, 27 changer transitions 12/87 dead transitions. [2023-11-29 05:26:34,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 932 flow [2023-11-29 05:26:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2023-11-29 05:26:34,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106280193236715 [2023-11-29 05:26:34,179 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 85 transitions. [2023-11-29 05:26:34,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 85 transitions. [2023-11-29 05:26:34,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:34,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 85 transitions. [2023-11-29 05:26:34,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 05:26:34,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,181 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,181 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 654 flow. Second operand 9 states and 85 transitions. [2023-11-29 05:26:34,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 932 flow [2023-11-29 05:26:34,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 862 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:34,190 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 619 flow [2023-11-29 05:26:34,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=619, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-29 05:26:34,191 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2023-11-29 05:26:34,191 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 619 flow [2023-11-29 05:26:34,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:34,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:34,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:34,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:26:34,191 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:34,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:34,192 INFO L85 PathProgramCache]: Analyzing trace with hash -585891354, now seen corresponding path program 17 times [2023-11-29 05:26:34,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:34,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114988558] [2023-11-29 05:26:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:34,315 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 05:26:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114988558] [2023-11-29 05:26:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114988558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:34,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:34,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212093703] [2023-11-29 05:26:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:34,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:34,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 619 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:34,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:34,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:34,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:34,537 INFO L124 PetriNetUnfolderBase]: 174/315 cut-off events. [2023-11-29 05:26:34,538 INFO L125 PetriNetUnfolderBase]: For 1481/1481 co-relation queries the response was YES. [2023-11-29 05:26:34,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 315 events. 174/315 cut-off events. For 1481/1481 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1074 event pairs, 24 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1371. Up to 185 conditions per place. [2023-11-29 05:26:34,540 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 50 selfloop transitions, 23 changer transitions 12/86 dead transitions. [2023-11-29 05:26:34,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 924 flow [2023-11-29 05:26:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2023-11-29 05:26:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40096618357487923 [2023-11-29 05:26:34,542 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 83 transitions. [2023-11-29 05:26:34,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 83 transitions. [2023-11-29 05:26:34,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 83 transitions. [2023-11-29 05:26:34,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,543 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,543 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 619 flow. Second operand 9 states and 83 transitions. [2023-11-29 05:26:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 924 flow [2023-11-29 05:26:34,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 866 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:34,549 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 577 flow [2023-11-29 05:26:34,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=577, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-11-29 05:26:34,549 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2023-11-29 05:26:34,549 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 577 flow [2023-11-29 05:26:34,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:34,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:34,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:34,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:26:34,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:34,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -253184530, now seen corresponding path program 18 times [2023-11-29 05:26:34,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:34,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882136937] [2023-11-29 05:26:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:34,668 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 05:26:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882136937] [2023-11-29 05:26:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882136937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:34,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302687808] [2023-11-29 05:26:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:34,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:34,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 577 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:34,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:34,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:34,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:34,896 INFO L124 PetriNetUnfolderBase]: 185/332 cut-off events. [2023-11-29 05:26:34,896 INFO L125 PetriNetUnfolderBase]: For 1530/1530 co-relation queries the response was YES. [2023-11-29 05:26:34,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 332 events. 185/332 cut-off events. For 1530/1530 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1145 event pairs, 26 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1423. Up to 189 conditions per place. [2023-11-29 05:26:34,900 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 50 selfloop transitions, 26 changer transitions 12/89 dead transitions. [2023-11-29 05:26:34,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 889 flow [2023-11-29 05:26:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2023-11-29 05:26:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2023-11-29 05:26:34,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 91 transitions. [2023-11-29 05:26:34,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 91 transitions. [2023-11-29 05:26:34,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:34,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 91 transitions. [2023-11-29 05:26:34,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 05:26:34,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,903 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,903 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 577 flow. Second operand 9 states and 91 transitions. [2023-11-29 05:26:34,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 889 flow [2023-11-29 05:26:34,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 835 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:34,910 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 597 flow [2023-11-29 05:26:34,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=597, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2023-11-29 05:26:34,911 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 56 predicate places. [2023-11-29 05:26:34,911 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 597 flow [2023-11-29 05:26:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:34,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:26:34,912 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1770973334, now seen corresponding path program 19 times [2023-11-29 05:26:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823808138] [2023-11-29 05:26:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:35,030 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 05:26:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:35,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823808138] [2023-11-29 05:26:35,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823808138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:35,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:35,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:35,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544765586] [2023-11-29 05:26:35,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:35,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:35,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:35,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:35,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:35,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:35,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 597 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:35,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:35,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:35,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:35,259 INFO L124 PetriNetUnfolderBase]: 177/322 cut-off events. [2023-11-29 05:26:35,259 INFO L125 PetriNetUnfolderBase]: For 1610/1610 co-relation queries the response was YES. [2023-11-29 05:26:35,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 322 events. 177/322 cut-off events. For 1610/1610 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1107 event pairs, 28 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 1405. Up to 195 conditions per place. [2023-11-29 05:26:35,263 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 46 selfloop transitions, 24 changer transitions 12/83 dead transitions. [2023-11-29 05:26:35,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 865 flow [2023-11-29 05:26:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2023-11-29 05:26:35,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-11-29 05:26:35,264 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 84 transitions. [2023-11-29 05:26:35,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 84 transitions. [2023-11-29 05:26:35,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:35,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 84 transitions. [2023-11-29 05:26:35,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 05:26:35,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,266 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 597 flow. Second operand 9 states and 84 transitions. [2023-11-29 05:26:35,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 865 flow [2023-11-29 05:26:35,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 799 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:35,273 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 558 flow [2023-11-29 05:26:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2023-11-29 05:26:35,274 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2023-11-29 05:26:35,274 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 558 flow [2023-11-29 05:26:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:35,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:35,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:26:35,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash 810433334, now seen corresponding path program 20 times [2023-11-29 05:26:35,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:35,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302785055] [2023-11-29 05:26:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:35,399 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 05:26:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:35,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302785055] [2023-11-29 05:26:35,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302785055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:35,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:35,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:26:35,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047211858] [2023-11-29 05:26:35,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:35,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:35,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:26:35,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:35,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:35,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:35,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:35,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:35,611 INFO L124 PetriNetUnfolderBase]: 182/329 cut-off events. [2023-11-29 05:26:35,611 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2023-11-29 05:26:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 329 events. 182/329 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1125 event pairs, 28 based on Foata normal form. 1/330 useless extension candidates. Maximal degree in co-relation 1405. Up to 197 conditions per place. [2023-11-29 05:26:35,615 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 48 selfloop transitions, 25 changer transitions 10/84 dead transitions. [2023-11-29 05:26:35,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 860 flow [2023-11-29 05:26:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-29 05:26:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41545893719806765 [2023-11-29 05:26:35,616 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-29 05:26:35,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-29 05:26:35,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:35,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-29 05:26:35,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 05:26:35,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,618 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,618 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 558 flow. Second operand 9 states and 86 transitions. [2023-11-29 05:26:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 860 flow [2023-11-29 05:26:35,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 806 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:35,626 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 584 flow [2023-11-29 05:26:35,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=584, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-11-29 05:26:35,627 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2023-11-29 05:26:35,627 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 584 flow [2023-11-29 05:26:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 05:26:35,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:35,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 05:26:35,627 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:35,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 335244326, now seen corresponding path program 1 times [2023-11-29 05:26:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490857848] [2023-11-29 05:26:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:35,668 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 05:26:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490857848] [2023-11-29 05:26:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490857848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:35,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:35,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452204588] [2023-11-29 05:26:35,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:35,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:35,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:35,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:35,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 584 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:35,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:35,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:35,819 INFO L124 PetriNetUnfolderBase]: 225/441 cut-off events. [2023-11-29 05:26:35,819 INFO L125 PetriNetUnfolderBase]: For 2897/2899 co-relation queries the response was YES. [2023-11-29 05:26:35,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 441 events. 225/441 cut-off events. For 2897/2899 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1919 event pairs, 28 based on Foata normal form. 16/451 useless extension candidates. Maximal degree in co-relation 2006. Up to 122 conditions per place. [2023-11-29 05:26:35,824 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 60 selfloop transitions, 28 changer transitions 4/107 dead transitions. [2023-11-29 05:26:35,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 1105 flow [2023-11-29 05:26:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:26:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:26:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-29 05:26:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2023-11-29 05:26:35,825 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-29 05:26:35,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-29 05:26:35,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:35,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-29 05:26:35,826 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 05:26:35,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 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 05:26:35,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 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 05:26:35,827 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 584 flow. Second operand 7 states and 88 transitions. [2023-11-29 05:26:35,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 1105 flow [2023-11-29 05:26:35,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 1029 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-29 05:26:35,835 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 795 flow [2023-11-29 05:26:35,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-29 05:26:35,836 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2023-11-29 05:26:35,836 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 795 flow [2023-11-29 05:26:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:35,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:35,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 05:26:35,836 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:35,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -75638356, now seen corresponding path program 2 times [2023-11-29 05:26:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:35,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796773648] [2023-11-29 05:26:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:35,872 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 05:26:35,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796773648] [2023-11-29 05:26:35,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796773648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:35,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:35,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605538672] [2023-11-29 05:26:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:35,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:35,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:35,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 795 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:35,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:35,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:36,039 INFO L124 PetriNetUnfolderBase]: 250/492 cut-off events. [2023-11-29 05:26:36,040 INFO L125 PetriNetUnfolderBase]: For 4320/4322 co-relation queries the response was YES. [2023-11-29 05:26:36,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 492 events. 250/492 cut-off events. For 4320/4322 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2202 event pairs, 57 based on Foata normal form. 10/497 useless extension candidates. Maximal degree in co-relation 2270. Up to 220 conditions per place. [2023-11-29 05:26:36,046 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 71 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2023-11-29 05:26:36,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 1176 flow [2023-11-29 05:26:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2023-11-29 05:26:36,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2023-11-29 05:26:36,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 76 transitions. [2023-11-29 05:26:36,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 76 transitions. [2023-11-29 05:26:36,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:36,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 76 transitions. [2023-11-29 05:26:36,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:36,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:36,049 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 795 flow. Second operand 5 states and 76 transitions. [2023-11-29 05:26:36,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 1176 flow [2023-11-29 05:26:36,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 1079 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-11-29 05:26:36,061 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 860 flow [2023-11-29 05:26:36,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=860, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-11-29 05:26:36,062 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2023-11-29 05:26:36,062 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 860 flow [2023-11-29 05:26:36,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:36,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:36,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 05:26:36,062 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:36,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash -514003769, now seen corresponding path program 1 times [2023-11-29 05:26:36,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:36,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10617717] [2023-11-29 05:26:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:36,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:36,100 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 05:26:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10617717] [2023-11-29 05:26:36,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10617717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820051835] [2023-11-29 05:26:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:36,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:36,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:36,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:26:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:36,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:26:36,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:36,233 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 05:26:36,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:36,268 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 05:26:36,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820051835] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:36,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:36,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-29 05:26:36,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320695695] [2023-11-29 05:26:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:26:36,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:36,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 860 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:36,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:36,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:36,458 INFO L124 PetriNetUnfolderBase]: 344/714 cut-off events. [2023-11-29 05:26:36,458 INFO L125 PetriNetUnfolderBase]: For 4790/4798 co-relation queries the response was YES. [2023-11-29 05:26:36,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 714 events. 344/714 cut-off events. For 4790/4798 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3748 event pairs, 21 based on Foata normal form. 18/729 useless extension candidates. Maximal degree in co-relation 2860. Up to 322 conditions per place. [2023-11-29 05:26:36,467 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 65 selfloop transitions, 34 changer transitions 0/114 dead transitions. [2023-11-29 05:26:36,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 114 transitions, 1295 flow [2023-11-29 05:26:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-29 05:26:36,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2023-11-29 05:26:36,468 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-29 05:26:36,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-29 05:26:36,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:36,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-29 05:26:36,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:36,470 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:36,470 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 860 flow. Second operand 5 states and 74 transitions. [2023-11-29 05:26:36,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 114 transitions, 1295 flow [2023-11-29 05:26:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 1220 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-11-29 05:26:36,487 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 1038 flow [2023-11-29 05:26:36,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1038, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-11-29 05:26:36,488 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 68 predicate places. [2023-11-29 05:26:36,488 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 1038 flow [2023-11-29 05:26:36,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:36,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:36,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:26:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:26:36,689 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:36,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 649451668, now seen corresponding path program 3 times [2023-11-29 05:26:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106116887] [2023-11-29 05:26:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:36,736 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 05:26:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106116887] [2023-11-29 05:26:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106116887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:36,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:36,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130578738] [2023-11-29 05:26:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:36,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:36,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:36,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 1038 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:36,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:36,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:36,972 INFO L124 PetriNetUnfolderBase]: 329/697 cut-off events. [2023-11-29 05:26:36,972 INFO L125 PetriNetUnfolderBase]: For 5117/5126 co-relation queries the response was YES. [2023-11-29 05:26:36,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 697 events. 329/697 cut-off events. For 5117/5126 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3676 event pairs, 46 based on Foata normal form. 17/714 useless extension candidates. Maximal degree in co-relation 3149. Up to 170 conditions per place. [2023-11-29 05:26:36,980 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 77 selfloop transitions, 30 changer transitions 5/127 dead transitions. [2023-11-29 05:26:36,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1480 flow [2023-11-29 05:26:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:26:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:26:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2023-11-29 05:26:36,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2023-11-29 05:26:36,982 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 105 transitions. [2023-11-29 05:26:36,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 105 transitions. [2023-11-29 05:26:36,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:36,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 105 transitions. [2023-11-29 05:26:36,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.125) internal successors, (105), 8 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 05:26:36,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,983 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:36,984 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 1038 flow. Second operand 8 states and 105 transitions. [2023-11-29 05:26:36,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1480 flow [2023-11-29 05:26:37,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1454 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 05:26:37,003 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 1077 flow [2023-11-29 05:26:37,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1077, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2023-11-29 05:26:37,004 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2023-11-29 05:26:37,004 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 1077 flow [2023-11-29 05:26:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:37,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:37,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 05:26:37,004 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:37,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1930953905, now seen corresponding path program 2 times [2023-11-29 05:26:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:37,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647973135] [2023-11-29 05:26:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:37,043 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 05:26:37,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:37,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647973135] [2023-11-29 05:26:37,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647973135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:37,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:37,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263228432] [2023-11-29 05:26:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:37,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:37,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 1077 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:37,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:37,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:37,224 INFO L124 PetriNetUnfolderBase]: 294/617 cut-off events. [2023-11-29 05:26:37,224 INFO L125 PetriNetUnfolderBase]: For 4813/4821 co-relation queries the response was YES. [2023-11-29 05:26:37,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 617 events. 294/617 cut-off events. For 4813/4821 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3133 event pairs, 25 based on Foata normal form. 20/632 useless extension candidates. Maximal degree in co-relation 2925. Up to 195 conditions per place. [2023-11-29 05:26:37,232 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 66 selfloop transitions, 24 changer transitions 3/107 dead transitions. [2023-11-29 05:26:37,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 1390 flow [2023-11-29 05:26:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2023-11-29 05:26:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-11-29 05:26:37,234 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 76 transitions. [2023-11-29 05:26:37,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 76 transitions. [2023-11-29 05:26:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:37,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 76 transitions. [2023-11-29 05:26:37,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,235 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 1077 flow. Second operand 6 states and 76 transitions. [2023-11-29 05:26:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 1390 flow [2023-11-29 05:26:37,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 1334 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 05:26:37,254 INFO L231 Difference]: Finished difference. Result has 103 places, 80 transitions, 983 flow [2023-11-29 05:26:37,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=103, PETRI_TRANSITIONS=80} [2023-11-29 05:26:37,254 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 78 predicate places. [2023-11-29 05:26:37,254 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 80 transitions, 983 flow [2023-11-29 05:26:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:37,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 05:26:37,255 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:37,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash -822119048, now seen corresponding path program 4 times [2023-11-29 05:26:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892808889] [2023-11-29 05:26:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:37,298 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 05:26:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892808889] [2023-11-29 05:26:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892808889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:37,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:37,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:37,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518086911] [2023-11-29 05:26:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:37,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:37,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 80 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:37,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:37,456 INFO L124 PetriNetUnfolderBase]: 259/536 cut-off events. [2023-11-29 05:26:37,456 INFO L125 PetriNetUnfolderBase]: For 4704/4710 co-relation queries the response was YES. [2023-11-29 05:26:37,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 536 events. 259/536 cut-off events. For 4704/4710 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2544 event pairs, 40 based on Foata normal form. 14/548 useless extension candidates. Maximal degree in co-relation 2551. Up to 297 conditions per place. [2023-11-29 05:26:37,463 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 62 selfloop transitions, 21 changer transitions 1/98 dead transitions. [2023-11-29 05:26:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 1200 flow [2023-11-29 05:26:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2023-11-29 05:26:37,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-29 05:26:37,464 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 69 transitions. [2023-11-29 05:26:37,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 69 transitions. [2023-11-29 05:26:37,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:37,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 69 transitions. [2023-11-29 05:26:37,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:37,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:37,465 INFO L175 Difference]: Start difference. First operand has 103 places, 80 transitions, 983 flow. Second operand 5 states and 69 transitions. [2023-11-29 05:26:37,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 1200 flow [2023-11-29 05:26:37,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 98 transitions, 1148 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:37,479 INFO L231 Difference]: Finished difference. Result has 100 places, 78 transitions, 921 flow [2023-11-29 05:26:37,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=921, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2023-11-29 05:26:37,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2023-11-29 05:26:37,480 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 921 flow [2023-11-29 05:26:37,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:37,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 05:26:37,481 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -60205933, now seen corresponding path program 3 times [2023-11-29 05:26:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928546975] [2023-11-29 05:26:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:37,516 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 05:26:37,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:37,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928546975] [2023-11-29 05:26:37,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928546975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:37,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:37,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852957078] [2023-11-29 05:26:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:37,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:37,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:37,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:37,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:37,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:37,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:37,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:37,696 INFO L124 PetriNetUnfolderBase]: 330/660 cut-off events. [2023-11-29 05:26:37,696 INFO L125 PetriNetUnfolderBase]: For 5514/5518 co-relation queries the response was YES. [2023-11-29 05:26:37,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 660 events. 330/660 cut-off events. For 5514/5518 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3288 event pairs, 99 based on Foata normal form. 12/663 useless extension candidates. Maximal degree in co-relation 3203. Up to 399 conditions per place. [2023-11-29 05:26:37,704 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 72 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2023-11-29 05:26:37,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 117 transitions, 1499 flow [2023-11-29 05:26:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2023-11-29 05:26:37,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260869565217392 [2023-11-29 05:26:37,705 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 72 transitions. [2023-11-29 05:26:37,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 72 transitions. [2023-11-29 05:26:37,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:37,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 72 transitions. [2023-11-29 05:26:37,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:37,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 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 05:26:37,707 INFO L175 Difference]: Start difference. First operand has 100 places, 78 transitions, 921 flow. Second operand 5 states and 72 transitions. [2023-11-29 05:26:37,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 117 transitions, 1499 flow [2023-11-29 05:26:37,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 117 transitions, 1416 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-29 05:26:37,722 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 1206 flow [2023-11-29 05:26:37,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1206, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2023-11-29 05:26:37,723 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 73 predicate places. [2023-11-29 05:26:37,723 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 1206 flow [2023-11-29 05:26:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:37,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:37,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 05:26:37,724 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:37,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash 601570357, now seen corresponding path program 4 times [2023-11-29 05:26:37,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:37,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917554805] [2023-11-29 05:26:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:37,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:37,759 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 05:26:37,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:37,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917554805] [2023-11-29 05:26:37,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917554805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:37,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:37,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624798864] [2023-11-29 05:26:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:37,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 1206 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:37,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:37,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:37,944 INFO L124 PetriNetUnfolderBase]: 320/651 cut-off events. [2023-11-29 05:26:37,945 INFO L125 PetriNetUnfolderBase]: For 5471/5475 co-relation queries the response was YES. [2023-11-29 05:26:37,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3419 conditions, 651 events. 320/651 cut-off events. For 5471/5475 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3282 event pairs, 64 based on Foata normal form. 12/656 useless extension candidates. Maximal degree in co-relation 2523. Up to 253 conditions per place. [2023-11-29 05:26:37,953 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 68 selfloop transitions, 32 changer transitions 3/117 dead transitions. [2023-11-29 05:26:37,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 117 transitions, 1564 flow [2023-11-29 05:26:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:26:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:26:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2023-11-29 05:26:37,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2023-11-29 05:26:37,955 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 83 transitions. [2023-11-29 05:26:37,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 83 transitions. [2023-11-29 05:26:37,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:37,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 83 transitions. [2023-11-29 05:26:37,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 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 05:26:37,956 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 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 05:26:37,956 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 1206 flow. Second operand 7 states and 83 transitions. [2023-11-29 05:26:37,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 117 transitions, 1564 flow [2023-11-29 05:26:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 1544 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-29 05:26:37,974 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 1260 flow [2023-11-29 05:26:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1260, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2023-11-29 05:26:37,975 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 80 predicate places. [2023-11-29 05:26:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 1260 flow [2023-11-29 05:26:37,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:37,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:37,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 05:26:37,976 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:37,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1669659212, now seen corresponding path program 5 times [2023-11-29 05:26:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:37,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658193120] [2023-11-29 05:26:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,017 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 05:26:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658193120] [2023-11-29 05:26:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658193120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:38,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739606675] [2023-11-29 05:26:38,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:38,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:38,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 1260 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:38,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:38,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:38,185 INFO L124 PetriNetUnfolderBase]: 273/559 cut-off events. [2023-11-29 05:26:38,186 INFO L125 PetriNetUnfolderBase]: For 5094/5096 co-relation queries the response was YES. [2023-11-29 05:26:38,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 559 events. 273/559 cut-off events. For 5094/5096 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2673 event pairs, 30 based on Foata normal form. 18/575 useless extension candidates. Maximal degree in co-relation 2542. Up to 172 conditions per place. [2023-11-29 05:26:38,192 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 72 selfloop transitions, 22 changer transitions 3/110 dead transitions. [2023-11-29 05:26:38,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 1517 flow [2023-11-29 05:26:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2023-11-29 05:26:38,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-11-29 05:26:38,194 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 76 transitions. [2023-11-29 05:26:38,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 76 transitions. [2023-11-29 05:26:38,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:38,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 76 transitions. [2023-11-29 05:26:38,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,195 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 1260 flow. Second operand 6 states and 76 transitions. [2023-11-29 05:26:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 110 transitions, 1517 flow [2023-11-29 05:26:38,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 1448 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-29 05:26:38,210 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 1097 flow [2023-11-29 05:26:38,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2023-11-29 05:26:38,211 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2023-11-29 05:26:38,211 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 1097 flow [2023-11-29 05:26:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:38,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 05:26:38,212 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:38,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1742954571, now seen corresponding path program 5 times [2023-11-29 05:26:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88260738] [2023-11-29 05:26:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,248 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 05:26:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88260738] [2023-11-29 05:26:38,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88260738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:38,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:38,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:26:38,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703227109] [2023-11-29 05:26:38,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:26:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:26:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:26:38,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:26:38,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 1097 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:38,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:26:38,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:38,429 INFO L124 PetriNetUnfolderBase]: 239/473 cut-off events. [2023-11-29 05:26:38,429 INFO L125 PetriNetUnfolderBase]: For 4659/4661 co-relation queries the response was YES. [2023-11-29 05:26:38,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 473 events. 239/473 cut-off events. For 4659/4661 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2089 event pairs, 42 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 2212. Up to 146 conditions per place. [2023-11-29 05:26:38,434 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 65 selfloop transitions, 27 changer transitions 2/107 dead transitions. [2023-11-29 05:26:38,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 1379 flow [2023-11-29 05:26:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:26:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:26:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2023-11-29 05:26:38,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163043478260869 [2023-11-29 05:26:38,435 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 95 transitions. [2023-11-29 05:26:38,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 95 transitions. [2023-11-29 05:26:38,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:38,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 95 transitions. [2023-11-29 05:26:38,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.875) internal successors, (95), 8 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 05:26:38,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,437 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,437 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 1097 flow. Second operand 8 states and 95 transitions. [2023-11-29 05:26:38,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 1379 flow [2023-11-29 05:26:38,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 107 transitions, 1304 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:38,450 INFO L231 Difference]: Finished difference. Result has 103 places, 79 transitions, 1009 flow [2023-11-29 05:26:38,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1009, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2023-11-29 05:26:38,451 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 78 predicate places. [2023-11-29 05:26:38,451 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 1009 flow [2023-11-29 05:26:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:38,451 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 05:26:38,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 05:26:38,452 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:38,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash -753432383, now seen corresponding path program 1 times [2023-11-29 05:26:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:38,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368210651] [2023-11-29 05:26:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:38,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:38,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368210651] [2023-11-29 05:26:38,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368210651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842441813] [2023-11-29 05:26:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:38,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:38,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:38,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:26:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:38,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:38,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:39,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842441813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:39,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:39,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:26:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001183122] [2023-11-29 05:26:39,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:39,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:26:39,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:26:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:26:39,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:39,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 1009 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:39,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:39,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:39,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:40,639 INFO L124 PetriNetUnfolderBase]: 727/1379 cut-off events. [2023-11-29 05:26:40,639 INFO L125 PetriNetUnfolderBase]: For 10178/10178 co-relation queries the response was YES. [2023-11-29 05:26:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6702 conditions, 1379 events. 727/1379 cut-off events. For 10178/10178 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7523 event pairs, 43 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 6108. Up to 241 conditions per place. [2023-11-29 05:26:40,650 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 135 selfloop transitions, 85 changer transitions 72/293 dead transitions. [2023-11-29 05:26:40,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 293 transitions, 3354 flow [2023-11-29 05:26:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:26:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 05:26:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 325 transitions. [2023-11-29 05:26:40,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.392512077294686 [2023-11-29 05:26:40,657 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 325 transitions. [2023-11-29 05:26:40,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 325 transitions. [2023-11-29 05:26:40,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:40,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 325 transitions. [2023-11-29 05:26:40,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 9.027777777777779) internal successors, (325), 36 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:40,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:40,661 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:40,661 INFO L175 Difference]: Start difference. First operand has 103 places, 79 transitions, 1009 flow. Second operand 36 states and 325 transitions. [2023-11-29 05:26:40,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 293 transitions, 3354 flow [2023-11-29 05:26:40,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 293 transitions, 3141 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:40,684 INFO L231 Difference]: Finished difference. Result has 150 places, 127 transitions, 1900 flow [2023-11-29 05:26:40,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1900, PETRI_PLACES=150, PETRI_TRANSITIONS=127} [2023-11-29 05:26:40,684 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2023-11-29 05:26:40,685 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 127 transitions, 1900 flow [2023-11-29 05:26:40,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:40,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:40,685 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 05:26:40,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:26:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:40,886 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:40,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1605833197, now seen corresponding path program 2 times [2023-11-29 05:26:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786449784] [2023-11-29 05:26:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:41,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786449784] [2023-11-29 05:26:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786449784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891462099] [2023-11-29 05:26:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:26:41,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:41,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:41,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:26:41,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:26:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:41,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:41,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:41,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891462099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:41,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:41,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:26:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746645563] [2023-11-29 05:26:41,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:41,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:26:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:26:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:26:41,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:41,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 127 transitions, 1900 flow. Second operand has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 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 05:26:41,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:41,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:41,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:42,078 INFO L124 PetriNetUnfolderBase]: 784/1575 cut-off events. [2023-11-29 05:26:42,078 INFO L125 PetriNetUnfolderBase]: For 11838/11838 co-relation queries the response was YES. [2023-11-29 05:26:42,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7862 conditions, 1575 events. 784/1575 cut-off events. For 11838/11838 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9451 event pairs, 111 based on Foata normal form. 3/1578 useless extension candidates. Maximal degree in co-relation 7765. Up to 675 conditions per place. [2023-11-29 05:26:42,093 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 103 selfloop transitions, 97 changer transitions 19/220 dead transitions. [2023-11-29 05:26:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 220 transitions, 3287 flow [2023-11-29 05:26:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:26:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:26:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 133 transitions. [2023-11-29 05:26:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-11-29 05:26:42,094 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 133 transitions. [2023-11-29 05:26:42,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 133 transitions. [2023-11-29 05:26:42,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:42,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 133 transitions. [2023-11-29 05:26:42,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:42,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:42,096 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:42,096 INFO L175 Difference]: Start difference. First operand has 150 places, 127 transitions, 1900 flow. Second operand 14 states and 133 transitions. [2023-11-29 05:26:42,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 220 transitions, 3287 flow [2023-11-29 05:26:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 220 transitions, 2773 flow, removed 175 selfloop flow, removed 17 redundant places. [2023-11-29 05:26:42,131 INFO L231 Difference]: Finished difference. Result has 140 places, 159 transitions, 2201 flow [2023-11-29 05:26:42,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2201, PETRI_PLACES=140, PETRI_TRANSITIONS=159} [2023-11-29 05:26:42,132 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 115 predicate places. [2023-11-29 05:26:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 159 transitions, 2201 flow [2023-11-29 05:26:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 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 05:26:42,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:42,133 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 05:26:42,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:26:42,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:42,333 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:42,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1044231857, now seen corresponding path program 3 times [2023-11-29 05:26:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271826916] [2023-11-29 05:26:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:42,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271826916] [2023-11-29 05:26:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271826916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944610361] [2023-11-29 05:26:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:26:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:42,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:42,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:26:42,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:26:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:42,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:42,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:42,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:42,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944610361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:42,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:42,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:26:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087853120] [2023-11-29 05:26:42,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:42,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:26:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:26:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:26:42,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:42,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 159 transitions, 2201 flow. Second operand has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 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 05:26:42,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:42,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:42,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:43,678 INFO L124 PetriNetUnfolderBase]: 929/1848 cut-off events. [2023-11-29 05:26:43,678 INFO L125 PetriNetUnfolderBase]: For 13095/13095 co-relation queries the response was YES. [2023-11-29 05:26:43,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8948 conditions, 1848 events. 929/1848 cut-off events. For 13095/13095 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11320 event pairs, 95 based on Foata normal form. 6/1854 useless extension candidates. Maximal degree in co-relation 8825. Up to 474 conditions per place. [2023-11-29 05:26:43,688 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 91 selfloop transitions, 142 changer transitions 28/262 dead transitions. [2023-11-29 05:26:43,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 262 transitions, 3803 flow [2023-11-29 05:26:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:26:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:26:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 158 transitions. [2023-11-29 05:26:43,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38164251207729466 [2023-11-29 05:26:43,689 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 158 transitions. [2023-11-29 05:26:43,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 158 transitions. [2023-11-29 05:26:43,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:43,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 158 transitions. [2023-11-29 05:26:43,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:43,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:43,691 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:43,691 INFO L175 Difference]: Start difference. First operand has 140 places, 159 transitions, 2201 flow. Second operand 18 states and 158 transitions. [2023-11-29 05:26:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 262 transitions, 3803 flow [2023-11-29 05:26:43,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 262 transitions, 3696 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-29 05:26:43,744 INFO L231 Difference]: Finished difference. Result has 156 places, 194 transitions, 3110 flow [2023-11-29 05:26:43,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3110, PETRI_PLACES=156, PETRI_TRANSITIONS=194} [2023-11-29 05:26:43,745 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 131 predicate places. [2023-11-29 05:26:43,745 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 194 transitions, 3110 flow [2023-11-29 05:26:43,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 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 05:26:43,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:43,745 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 05:26:43,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:26:43,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:43,946 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:43,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1123623963, now seen corresponding path program 4 times [2023-11-29 05:26:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505440869] [2023-11-29 05:26:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:44,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505440869] [2023-11-29 05:26:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505440869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453365039] [2023-11-29 05:26:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:26:44,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:44,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:44,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:26:44,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:26:44,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:44,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:44,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:44,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453365039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:44,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:44,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:26:44,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257018639] [2023-11-29 05:26:44,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:26:44,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:26:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:26:44,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 194 transitions, 3110 flow. Second operand has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 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 05:26:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:44,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:45,233 INFO L124 PetriNetUnfolderBase]: 868/1739 cut-off events. [2023-11-29 05:26:45,233 INFO L125 PetriNetUnfolderBase]: For 15497/15497 co-relation queries the response was YES. [2023-11-29 05:26:45,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9372 conditions, 1739 events. 868/1739 cut-off events. For 15497/15497 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10662 event pairs, 109 based on Foata normal form. 4/1743 useless extension candidates. Maximal degree in co-relation 9245. Up to 567 conditions per place. [2023-11-29 05:26:45,245 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 84 selfloop transitions, 137 changer transitions 18/240 dead transitions. [2023-11-29 05:26:45,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 240 transitions, 3901 flow [2023-11-29 05:26:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:26:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:26:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 147 transitions. [2023-11-29 05:26:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37595907928388744 [2023-11-29 05:26:45,247 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 147 transitions. [2023-11-29 05:26:45,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 147 transitions. [2023-11-29 05:26:45,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:45,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 147 transitions. [2023-11-29 05:26:45,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,249 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,249 INFO L175 Difference]: Start difference. First operand has 156 places, 194 transitions, 3110 flow. Second operand 17 states and 147 transitions. [2023-11-29 05:26:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 240 transitions, 3901 flow [2023-11-29 05:26:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 240 transitions, 3688 flow, removed 77 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:45,323 INFO L231 Difference]: Finished difference. Result has 167 places, 189 transitions, 3086 flow [2023-11-29 05:26:45,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3086, PETRI_PLACES=167, PETRI_TRANSITIONS=189} [2023-11-29 05:26:45,324 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 142 predicate places. [2023-11-29 05:26:45,324 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 189 transitions, 3086 flow [2023-11-29 05:26:45,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 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 05:26:45,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:45,324 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 05:26:45,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:26:45,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:45,525 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:45,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1211560697, now seen corresponding path program 5 times [2023-11-29 05:26:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91718868] [2023-11-29 05:26:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:45,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91718868] [2023-11-29 05:26:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91718868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793137459] [2023-11-29 05:26:45,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:26:45,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:45,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:45,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:26:45,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:26:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:45,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:26:45,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:45,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:45,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793137459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:45,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:45,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-29 05:26:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439445513] [2023-11-29 05:26:45,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:26:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:26:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:26:45,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:45,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 189 transitions, 3086 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 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 05:26:45,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:45,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:45,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:46,524 INFO L124 PetriNetUnfolderBase]: 802/1581 cut-off events. [2023-11-29 05:26:46,524 INFO L125 PetriNetUnfolderBase]: For 14830/14830 co-relation queries the response was YES. [2023-11-29 05:26:46,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 1581 events. 802/1581 cut-off events. For 14830/14830 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9151 event pairs, 187 based on Foata normal form. 2/1583 useless extension candidates. Maximal degree in co-relation 8825. Up to 1085 conditions per place. [2023-11-29 05:26:46,534 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 113 selfloop transitions, 65 changer transitions 52/231 dead transitions. [2023-11-29 05:26:46,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 3909 flow [2023-11-29 05:26:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:26:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:26:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 122 transitions. [2023-11-29 05:26:46,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37888198757763975 [2023-11-29 05:26:46,536 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 122 transitions. [2023-11-29 05:26:46,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 122 transitions. [2023-11-29 05:26:46,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:46,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 122 transitions. [2023-11-29 05:26:46,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 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 05:26:46,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:46,538 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:46,538 INFO L175 Difference]: Start difference. First operand has 167 places, 189 transitions, 3086 flow. Second operand 14 states and 122 transitions. [2023-11-29 05:26:46,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 3909 flow [2023-11-29 05:26:46,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 231 transitions, 3680 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-29 05:26:46,600 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 2498 flow [2023-11-29 05:26:46,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2498, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2023-11-29 05:26:46,601 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 141 predicate places. [2023-11-29 05:26:46,601 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 2498 flow [2023-11-29 05:26:46,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 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 05:26:46,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:46,602 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] [2023-11-29 05:26:46,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:26:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:46,803 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:46,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash 248829797, now seen corresponding path program 6 times [2023-11-29 05:26:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:46,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480373025] [2023-11-29 05:26:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:46,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:46,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480373025] [2023-11-29 05:26:46,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480373025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:46,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516886172] [2023-11-29 05:26:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:26:46,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:46,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:46,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:26:47,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:26:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:47,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:47,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:47,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:47,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516886172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:47,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:47,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:26:47,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586068621] [2023-11-29 05:26:47,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:47,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:26:47,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:26:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:26:47,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:47,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 2498 flow. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:26:47,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:47,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:47,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:47,903 INFO L124 PetriNetUnfolderBase]: 759/1526 cut-off events. [2023-11-29 05:26:47,903 INFO L125 PetriNetUnfolderBase]: For 12840/12840 co-relation queries the response was YES. [2023-11-29 05:26:47,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7911 conditions, 1526 events. 759/1526 cut-off events. For 12840/12840 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8993 event pairs, 133 based on Foata normal form. 2/1528 useless extension candidates. Maximal degree in co-relation 7781. Up to 703 conditions per place. [2023-11-29 05:26:47,926 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 107 selfloop transitions, 91 changer transitions 22/221 dead transitions. [2023-11-29 05:26:47,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 221 transitions, 3422 flow [2023-11-29 05:26:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:26:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:26:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 129 transitions. [2023-11-29 05:26:47,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40062111801242234 [2023-11-29 05:26:47,927 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 129 transitions. [2023-11-29 05:26:47,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 129 transitions. [2023-11-29 05:26:47,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:47,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 129 transitions. [2023-11-29 05:26:47,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,929 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:47,929 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 2498 flow. Second operand 14 states and 129 transitions. [2023-11-29 05:26:47,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 221 transitions, 3422 flow [2023-11-29 05:26:47,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 221 transitions, 3046 flow, removed 25 selfloop flow, removed 19 redundant places. [2023-11-29 05:26:47,968 INFO L231 Difference]: Finished difference. Result has 149 places, 157 transitions, 2296 flow [2023-11-29 05:26:47,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2296, PETRI_PLACES=149, PETRI_TRANSITIONS=157} [2023-11-29 05:26:47,969 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 124 predicate places. [2023-11-29 05:26:47,969 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 157 transitions, 2296 flow [2023-11-29 05:26:47,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:26:47,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:47,969 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 05:26:47,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:26:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:48,170 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:48,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1670682725, now seen corresponding path program 7 times [2023-11-29 05:26:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582639415] [2023-11-29 05:26:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582639415] [2023-11-29 05:26:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582639415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621933799] [2023-11-29 05:26:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:26:48,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:48,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:48,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:48,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:26:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:48,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:48,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:48,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:48,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621933799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:48,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:26:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057336020] [2023-11-29 05:26:48,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:48,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:26:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:26:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:26:48,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:48,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 157 transitions, 2296 flow. Second operand has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 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 05:26:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:48,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:48,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:49,504 INFO L124 PetriNetUnfolderBase]: 1338/2714 cut-off events. [2023-11-29 05:26:49,504 INFO L125 PetriNetUnfolderBase]: For 21977/21977 co-relation queries the response was YES. [2023-11-29 05:26:49,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 2714 events. 1338/2714 cut-off events. For 21977/21977 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18638 event pairs, 99 based on Foata normal form. 28/2742 useless extension candidates. Maximal degree in co-relation 13293. Up to 640 conditions per place. [2023-11-29 05:26:49,517 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 117 selfloop transitions, 234 changer transitions 19/371 dead transitions. [2023-11-29 05:26:49,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 371 transitions, 5936 flow [2023-11-29 05:26:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:26:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:26:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 213 transitions. [2023-11-29 05:26:49,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858695652173913 [2023-11-29 05:26:49,519 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 213 transitions. [2023-11-29 05:26:49,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 213 transitions. [2023-11-29 05:26:49,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:49,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 213 transitions. [2023-11-29 05:26:49,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.875) internal successors, (213), 24 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,521 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,521 INFO L175 Difference]: Start difference. First operand has 149 places, 157 transitions, 2296 flow. Second operand 24 states and 213 transitions. [2023-11-29 05:26:49,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 371 transitions, 5936 flow [2023-11-29 05:26:49,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 371 transitions, 5780 flow, removed 28 selfloop flow, removed 8 redundant places. [2023-11-29 05:26:49,608 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 5190 flow [2023-11-29 05:26:49,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5190, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2023-11-29 05:26:49,609 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 145 predicate places. [2023-11-29 05:26:49,609 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 5190 flow [2023-11-29 05:26:49,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 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 05:26:49,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:49,609 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 05:26:49,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:26:49,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 05:26:49,810 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:49,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:49,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1460633223, now seen corresponding path program 8 times [2023-11-29 05:26:49,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:49,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264470023] [2023-11-29 05:26:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:49,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:49,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:49,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264470023] [2023-11-29 05:26:49,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264470023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:49,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890530356] [2023-11-29 05:26:49,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:26:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:49,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:49,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:26:50,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:26:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:50,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:50,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:50,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:50,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890530356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:50,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:50,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-11-29 05:26:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239454569] [2023-11-29 05:26:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:50,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:26:50,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:26:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:26:50,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:50,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 5190 flow. Second operand has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 22 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 05:26:50,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:50,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:50,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:51,340 INFO L124 PetriNetUnfolderBase]: 1711/3409 cut-off events. [2023-11-29 05:26:51,340 INFO L125 PetriNetUnfolderBase]: For 36479/36479 co-relation queries the response was YES. [2023-11-29 05:26:51,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19339 conditions, 3409 events. 1711/3409 cut-off events. For 36479/36479 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23998 event pairs, 347 based on Foata normal form. 12/3421 useless extension candidates. Maximal degree in co-relation 19131. Up to 1785 conditions per place. [2023-11-29 05:26:51,358 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 142 selfloop transitions, 154 changer transitions 131/428 dead transitions. [2023-11-29 05:26:51,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 428 transitions, 8257 flow [2023-11-29 05:26:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:26:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:26:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 118 transitions. [2023-11-29 05:26:51,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34202898550724636 [2023-11-29 05:26:51,359 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 118 transitions. [2023-11-29 05:26:51,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 118 transitions. [2023-11-29 05:26:51,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:51,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 118 transitions. [2023-11-29 05:26:51,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:51,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:51,361 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:51,361 INFO L175 Difference]: Start difference. First operand has 170 places, 293 transitions, 5190 flow. Second operand 15 states and 118 transitions. [2023-11-29 05:26:51,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 428 transitions, 8257 flow [2023-11-29 05:26:51,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 428 transitions, 7864 flow, removed 139 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:51,492 INFO L231 Difference]: Finished difference. Result has 183 places, 285 transitions, 5153 flow [2023-11-29 05:26:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5153, PETRI_PLACES=183, PETRI_TRANSITIONS=285} [2023-11-29 05:26:51,493 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 158 predicate places. [2023-11-29 05:26:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 285 transitions, 5153 flow [2023-11-29 05:26:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 22 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 05:26:51,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:51,493 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 05:26:51,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:26:51,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 05:26:51,694 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:51,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 320813123, now seen corresponding path program 9 times [2023-11-29 05:26:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004920128] [2023-11-29 05:26:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004920128] [2023-11-29 05:26:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004920128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730452594] [2023-11-29 05:26:51,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:26:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:51,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:51,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:26:51,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:26:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:51,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:51,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:51,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:52,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730452594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:52,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:52,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-11-29 05:26:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989127560] [2023-11-29 05:26:52,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:26:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:26:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:26:52,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:52,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 285 transitions, 5153 flow. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 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 05:26:52,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:52,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:52,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:53,331 INFO L124 PetriNetUnfolderBase]: 1250/2606 cut-off events. [2023-11-29 05:26:53,331 INFO L125 PetriNetUnfolderBase]: For 28972/28972 co-relation queries the response was YES. [2023-11-29 05:26:53,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14661 conditions, 2606 events. 1250/2606 cut-off events. For 28972/28972 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18107 event pairs, 57 based on Foata normal form. 23/2629 useless extension candidates. Maximal degree in co-relation 14453. Up to 968 conditions per place. [2023-11-29 05:26:53,350 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 99 selfloop transitions, 218 changer transitions 45/363 dead transitions. [2023-11-29 05:26:53,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 363 transitions, 6706 flow [2023-11-29 05:26:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:26:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 05:26:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 205 transitions. [2023-11-29 05:26:53,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.342809364548495 [2023-11-29 05:26:53,352 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 205 transitions. [2023-11-29 05:26:53,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 205 transitions. [2023-11-29 05:26:53,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:53,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 205 transitions. [2023-11-29 05:26:53,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.884615384615385) internal successors, (205), 26 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,354 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 23.0) internal successors, (621), 27 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,354 INFO L175 Difference]: Start difference. First operand has 183 places, 285 transitions, 5153 flow. Second operand 26 states and 205 transitions. [2023-11-29 05:26:53,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 363 transitions, 6706 flow [2023-11-29 05:26:53,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 363 transitions, 6298 flow, removed 57 selfloop flow, removed 13 redundant places. [2023-11-29 05:26:53,468 INFO L231 Difference]: Finished difference. Result has 193 places, 279 transitions, 5408 flow [2023-11-29 05:26:53,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5408, PETRI_PLACES=193, PETRI_TRANSITIONS=279} [2023-11-29 05:26:53,469 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 168 predicate places. [2023-11-29 05:26:53,469 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 279 transitions, 5408 flow [2023-11-29 05:26:53,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 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 05:26:53,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:53,469 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] [2023-11-29 05:26:53,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:26:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:26:53,670 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 55395301, now seen corresponding path program 10 times [2023-11-29 05:26:53,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:53,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330074064] [2023-11-29 05:26:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:53,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:53,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330074064] [2023-11-29 05:26:53,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330074064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:53,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124968629] [2023-11-29 05:26:53,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:26:53,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:53,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:53,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:53,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:26:53,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:26:53,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:53,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:53,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:53,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:54,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124968629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:54,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:54,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-11-29 05:26:54,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792691810] [2023-11-29 05:26:54,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:54,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:26:54,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:26:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:26:54,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:54,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 279 transitions, 5408 flow. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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 05:26:54,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:54,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:54,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:55,283 INFO L124 PetriNetUnfolderBase]: 1156/2404 cut-off events. [2023-11-29 05:26:55,283 INFO L125 PetriNetUnfolderBase]: For 28598/28598 co-relation queries the response was YES. [2023-11-29 05:26:55,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14307 conditions, 2404 events. 1156/2404 cut-off events. For 28598/28598 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16279 event pairs, 47 based on Foata normal form. 2/2406 useless extension candidates. Maximal degree in co-relation 14063. Up to 968 conditions per place. [2023-11-29 05:26:55,298 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 90 selfloop transitions, 213 changer transitions 24/328 dead transitions. [2023-11-29 05:26:55,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 328 transitions, 6330 flow [2023-11-29 05:26:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:26:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:26:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 188 transitions. [2023-11-29 05:26:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269565217391304 [2023-11-29 05:26:55,300 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 188 transitions. [2023-11-29 05:26:55,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 188 transitions. [2023-11-29 05:26:55,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:55,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 188 transitions. [2023-11-29 05:26:55,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:55,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 23.0) internal successors, (598), 26 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:55,302 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 23.0) internal successors, (598), 26 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:55,302 INFO L175 Difference]: Start difference. First operand has 193 places, 279 transitions, 5408 flow. Second operand 25 states and 188 transitions. [2023-11-29 05:26:55,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 328 transitions, 6330 flow [2023-11-29 05:26:55,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 328 transitions, 6075 flow, removed 102 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:55,407 INFO L231 Difference]: Finished difference. Result has 211 places, 273 transitions, 5473 flow [2023-11-29 05:26:55,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5154, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5473, PETRI_PLACES=211, PETRI_TRANSITIONS=273} [2023-11-29 05:26:55,407 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2023-11-29 05:26:55,408 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 273 transitions, 5473 flow [2023-11-29 05:26:55,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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 05:26:55,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:55,408 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 05:26:55,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:26:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 05:26:55,608 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:55,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1061765221, now seen corresponding path program 11 times [2023-11-29 05:26:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:55,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133525640] [2023-11-29 05:26:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133525640] [2023-11-29 05:26:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133525640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329867039] [2023-11-29 05:26:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:26:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:55,740 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:55,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:26:55,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:26:55,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:55,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:26:55,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:55,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:55,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329867039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:55,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:26:55,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-29 05:26:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750333758] [2023-11-29 05:26:55,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:55,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:26:55,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:26:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:26:55,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:55,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 273 transitions, 5473 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:55,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:55,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:55,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:56,393 INFO L124 PetriNetUnfolderBase]: 1227/2547 cut-off events. [2023-11-29 05:26:56,393 INFO L125 PetriNetUnfolderBase]: For 31896/31896 co-relation queries the response was YES. [2023-11-29 05:26:56,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15694 conditions, 2547 events. 1227/2547 cut-off events. For 31896/31896 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17482 event pairs, 318 based on Foata normal form. 4/2551 useless extension candidates. Maximal degree in co-relation 15488. Up to 1715 conditions per place. [2023-11-29 05:26:56,412 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 172 selfloop transitions, 110 changer transitions 46/329 dead transitions. [2023-11-29 05:26:56,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 329 transitions, 7087 flow [2023-11-29 05:26:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:26:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:26:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2023-11-29 05:26:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106280193236715 [2023-11-29 05:26:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 85 transitions. [2023-11-29 05:26:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 85 transitions. [2023-11-29 05:26:56,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:56,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 85 transitions. [2023-11-29 05:26:56,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 05:26:56,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:56,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:56,414 INFO L175 Difference]: Start difference. First operand has 211 places, 273 transitions, 5473 flow. Second operand 9 states and 85 transitions. [2023-11-29 05:26:56,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 329 transitions, 7087 flow [2023-11-29 05:26:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 329 transitions, 6656 flow, removed 6 selfloop flow, removed 20 redundant places. [2023-11-29 05:26:56,527 INFO L231 Difference]: Finished difference. Result has 196 places, 268 transitions, 5410 flow [2023-11-29 05:26:56,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5410, PETRI_PLACES=196, PETRI_TRANSITIONS=268} [2023-11-29 05:26:56,528 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 171 predicate places. [2023-11-29 05:26:56,528 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 268 transitions, 5410 flow [2023-11-29 05:26:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:56,528 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 05:26:56,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:26:56,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 05:26:56,729 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:56,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1823498865, now seen corresponding path program 12 times [2023-11-29 05:26:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:56,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90215916] [2023-11-29 05:26:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:56,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90215916] [2023-11-29 05:26:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90215916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707353306] [2023-11-29 05:26:56,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:26:56,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:56,861 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:56,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:26:56,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:26:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:56,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:56,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:56,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707353306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:57,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2023-11-29 05:26:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484769147] [2023-11-29 05:26:57,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:57,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:26:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:26:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:26:57,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:57,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 268 transitions, 5410 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 05:26:57,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:57,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:58,252 INFO L124 PetriNetUnfolderBase]: 1087/2244 cut-off events. [2023-11-29 05:26:58,252 INFO L125 PetriNetUnfolderBase]: For 27321/27321 co-relation queries the response was YES. [2023-11-29 05:26:58,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13987 conditions, 2244 events. 1087/2244 cut-off events. For 27321/27321 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14963 event pairs, 91 based on Foata normal form. 35/2279 useless extension candidates. Maximal degree in co-relation 13802. Up to 608 conditions per place. [2023-11-29 05:26:58,267 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 99 selfloop transitions, 187 changer transitions 38/325 dead transitions. [2023-11-29 05:26:58,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 325 transitions, 6481 flow [2023-11-29 05:26:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:26:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:26:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 182 transitions. [2023-11-29 05:26:58,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32971014492753625 [2023-11-29 05:26:58,268 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 182 transitions. [2023-11-29 05:26:58,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 182 transitions. [2023-11-29 05:26:58,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:58,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 182 transitions. [2023-11-29 05:26:58,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:58,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:58,270 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 23.0) internal successors, (575), 25 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:58,270 INFO L175 Difference]: Start difference. First operand has 196 places, 268 transitions, 5410 flow. Second operand 24 states and 182 transitions. [2023-11-29 05:26:58,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 325 transitions, 6481 flow [2023-11-29 05:26:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 325 transitions, 6166 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-29 05:26:58,369 INFO L231 Difference]: Finished difference. Result has 210 places, 251 transitions, 5185 flow [2023-11-29 05:26:58,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4836, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5185, PETRI_PLACES=210, PETRI_TRANSITIONS=251} [2023-11-29 05:26:58,369 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 185 predicate places. [2023-11-29 05:26:58,369 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 251 transitions, 5185 flow [2023-11-29 05:26:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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 05:26:58,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:58,370 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 05:26:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:26:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 05:26:58,570 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:26:58,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash -478113811, now seen corresponding path program 13 times [2023-11-29 05:26:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456264239] [2023-11-29 05:26:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:58,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:58,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456264239] [2023-11-29 05:26:58,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456264239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:26:58,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532418725] [2023-11-29 05:26:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:26:58,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:58,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:58,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:26:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:58,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:58,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:58,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532418725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:59,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:26:59,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:26:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171768378] [2023-11-29 05:26:59,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:26:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:26:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:26:59,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:26:59,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 251 transitions, 5185 flow. Second operand has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 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 05:26:59,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:59,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:26:59,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:00,131 INFO L124 PetriNetUnfolderBase]: 1092/2245 cut-off events. [2023-11-29 05:27:00,131 INFO L125 PetriNetUnfolderBase]: For 29273/29273 co-relation queries the response was YES. [2023-11-29 05:27:00,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 2245 events. 1092/2245 cut-off events. For 29273/29273 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15093 event pairs, 85 based on Foata normal form. 9/2254 useless extension candidates. Maximal degree in co-relation 13972. Up to 656 conditions per place. [2023-11-29 05:27:00,145 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 116 selfloop transitions, 191 changer transitions 44/352 dead transitions. [2023-11-29 05:27:00,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 352 transitions, 6780 flow [2023-11-29 05:27:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:27:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:27:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 239 transitions. [2023-11-29 05:27:00,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3583208395802099 [2023-11-29 05:27:00,147 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 239 transitions. [2023-11-29 05:27:00,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 239 transitions. [2023-11-29 05:27:00,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:00,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 239 transitions. [2023-11-29 05:27:00,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.241379310344827) internal successors, (239), 29 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:00,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:00,148 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 23.0) internal successors, (690), 30 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:00,148 INFO L175 Difference]: Start difference. First operand has 210 places, 251 transitions, 5185 flow. Second operand 29 states and 239 transitions. [2023-11-29 05:27:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 352 transitions, 6780 flow [2023-11-29 05:27:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 352 transitions, 6372 flow, removed 46 selfloop flow, removed 18 redundant places. [2023-11-29 05:27:00,234 INFO L231 Difference]: Finished difference. Result has 220 places, 257 transitions, 5375 flow [2023-11-29 05:27:00,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5375, PETRI_PLACES=220, PETRI_TRANSITIONS=257} [2023-11-29 05:27:00,235 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2023-11-29 05:27:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 257 transitions, 5375 flow [2023-11-29 05:27:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 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 05:27:00,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:00,235 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] [2023-11-29 05:27:00,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:27:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 05:27:00,435 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:00,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash -651795407, now seen corresponding path program 14 times [2023-11-29 05:27:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:00,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249361797] [2023-11-29 05:27:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249361797] [2023-11-29 05:27:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249361797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336454152] [2023-11-29 05:27:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:00,543 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:00,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:27:00,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:00,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:00,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:00,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:00,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:00,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336454152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:00,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:00,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:27:00,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090083468] [2023-11-29 05:27:00,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:00,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:27:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:27:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:27:00,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:00,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 257 transitions, 5375 flow. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 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 05:27:00,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:00,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:00,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:01,972 INFO L124 PetriNetUnfolderBase]: 1096/2273 cut-off events. [2023-11-29 05:27:01,972 INFO L125 PetriNetUnfolderBase]: For 28702/28702 co-relation queries the response was YES. [2023-11-29 05:27:01,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14408 conditions, 2273 events. 1096/2273 cut-off events. For 28702/28702 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15304 event pairs, 81 based on Foata normal form. 9/2282 useless extension candidates. Maximal degree in co-relation 14261. Up to 669 conditions per place. [2023-11-29 05:27:01,986 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 77 selfloop transitions, 132 changer transitions 116/326 dead transitions. [2023-11-29 05:27:01,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 326 transitions, 6700 flow [2023-11-29 05:27:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:27:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 05:27:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 202 transitions. [2023-11-29 05:27:01,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252818035426731 [2023-11-29 05:27:01,988 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 202 transitions. [2023-11-29 05:27:01,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 202 transitions. [2023-11-29 05:27:01,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:01,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 202 transitions. [2023-11-29 05:27:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.481481481481482) internal successors, (202), 27 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:01,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:01,990 INFO L175 Difference]: Start difference. First operand has 220 places, 257 transitions, 5375 flow. Second operand 27 states and 202 transitions. [2023-11-29 05:27:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 326 transitions, 6700 flow [2023-11-29 05:27:02,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 326 transitions, 6286 flow, removed 51 selfloop flow, removed 21 redundant places. [2023-11-29 05:27:02,081 INFO L231 Difference]: Finished difference. Result has 220 places, 183 transitions, 3780 flow [2023-11-29 05:27:02,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3780, PETRI_PLACES=220, PETRI_TRANSITIONS=183} [2023-11-29 05:27:02,082 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2023-11-29 05:27:02,082 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 183 transitions, 3780 flow [2023-11-29 05:27:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 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 05:27:02,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:02,082 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 05:27:02,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:27:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 05:27:02,282 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2046414415, now seen corresponding path program 15 times [2023-11-29 05:27:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322647808] [2023-11-29 05:27:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322647808] [2023-11-29 05:27:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322647808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474267926] [2023-11-29 05:27:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:27:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:02,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:02,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:27:02,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:27:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:02,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:02,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:02,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474267926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:02,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:02,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730567844] [2023-11-29 05:27:02,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:02,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:02,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:02,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:02,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 183 transitions, 3780 flow. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:27:02,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:02,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:02,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:04,023 INFO L124 PetriNetUnfolderBase]: 1551/3318 cut-off events. [2023-11-29 05:27:04,023 INFO L125 PetriNetUnfolderBase]: For 36233/36233 co-relation queries the response was YES. [2023-11-29 05:27:04,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20009 conditions, 3318 events. 1551/3318 cut-off events. For 36233/36233 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24926 event pairs, 77 based on Foata normal form. 18/3336 useless extension candidates. Maximal degree in co-relation 19765. Up to 650 conditions per place. [2023-11-29 05:27:04,053 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 156 selfloop transitions, 171 changer transitions 117/445 dead transitions. [2023-11-29 05:27:04,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 445 transitions, 9275 flow [2023-11-29 05:27:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:27:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:27:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 241 transitions. [2023-11-29 05:27:04,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492753623188406 [2023-11-29 05:27:04,055 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 241 transitions. [2023-11-29 05:27:04,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 241 transitions. [2023-11-29 05:27:04,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:04,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 241 transitions. [2023-11-29 05:27:04,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.033333333333333) internal successors, (241), 30 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 23.0) internal successors, (713), 31 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,057 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 23.0) internal successors, (713), 31 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,057 INFO L175 Difference]: Start difference. First operand has 220 places, 183 transitions, 3780 flow. Second operand 30 states and 241 transitions. [2023-11-29 05:27:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 445 transitions, 9275 flow [2023-11-29 05:27:04,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 445 transitions, 7846 flow, removed 151 selfloop flow, removed 30 redundant places. [2023-11-29 05:27:04,190 INFO L231 Difference]: Finished difference. Result has 202 places, 241 transitions, 5035 flow [2023-11-29 05:27:04,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5035, PETRI_PLACES=202, PETRI_TRANSITIONS=241} [2023-11-29 05:27:04,190 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 177 predicate places. [2023-11-29 05:27:04,191 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 241 transitions, 5035 flow [2023-11-29 05:27:04,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:27:04,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:04,191 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 05:27:04,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:27:04,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 05:27:04,391 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:04,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1358716495, now seen corresponding path program 16 times [2023-11-29 05:27:04,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:04,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949926600] [2023-11-29 05:27:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:04,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949926600] [2023-11-29 05:27:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949926600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462818075] [2023-11-29 05:27:04,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:27:04,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:04,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:04,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:04,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:27:04,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:27:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:04,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:04,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:04,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:04,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462818075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:04,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:27:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989656151] [2023-11-29 05:27:04,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:27:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:27:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:27:04,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:04,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 241 transitions, 5035 flow. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 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 05:27:04,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:04,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:06,171 INFO L124 PetriNetUnfolderBase]: 1781/4021 cut-off events. [2023-11-29 05:27:06,171 INFO L125 PetriNetUnfolderBase]: For 38275/38275 co-relation queries the response was YES. [2023-11-29 05:27:06,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22752 conditions, 4021 events. 1781/4021 cut-off events. For 38275/38275 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33451 event pairs, 241 based on Foata normal form. 30/4051 useless extension candidates. Maximal degree in co-relation 22694. Up to 1221 conditions per place. [2023-11-29 05:27:06,194 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 161 selfloop transitions, 301 changer transitions 62/525 dead transitions. [2023-11-29 05:27:06,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 525 transitions, 10989 flow [2023-11-29 05:27:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:27:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:27:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 255 transitions. [2023-11-29 05:27:06,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2023-11-29 05:27:06,196 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 255 transitions. [2023-11-29 05:27:06,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 255 transitions. [2023-11-29 05:27:06,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:06,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 255 transitions. [2023-11-29 05:27:06,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.5) internal successors, (255), 30 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:06,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 23.0) internal successors, (713), 31 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:06,198 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 23.0) internal successors, (713), 31 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:06,198 INFO L175 Difference]: Start difference. First operand has 202 places, 241 transitions, 5035 flow. Second operand 30 states and 255 transitions. [2023-11-29 05:27:06,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 525 transitions, 10989 flow [2023-11-29 05:27:06,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 525 transitions, 9907 flow, removed 61 selfloop flow, removed 18 redundant places. [2023-11-29 05:27:06,357 INFO L231 Difference]: Finished difference. Result has 213 places, 389 transitions, 8456 flow [2023-11-29 05:27:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8456, PETRI_PLACES=213, PETRI_TRANSITIONS=389} [2023-11-29 05:27:06,357 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-11-29 05:27:06,358 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 389 transitions, 8456 flow [2023-11-29 05:27:06,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 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 05:27:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:06,358 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 05:27:06,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:27:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 05:27:06,558 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:06,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 942589455, now seen corresponding path program 17 times [2023-11-29 05:27:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776873150] [2023-11-29 05:27:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776873150] [2023-11-29 05:27:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776873150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271239282] [2023-11-29 05:27:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:27:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:06,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:27:06,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:27:06,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:06,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:27:06,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:06,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:27:06,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271239282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:27:06,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:27:06,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-29 05:27:06,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698250495] [2023-11-29 05:27:06,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:27:06,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:27:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:27:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:27:06,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:06,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 389 transitions, 8456 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:06,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:06,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:06,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:07,561 INFO L124 PetriNetUnfolderBase]: 1509/3397 cut-off events. [2023-11-29 05:27:07,561 INFO L125 PetriNetUnfolderBase]: For 35093/35093 co-relation queries the response was YES. [2023-11-29 05:27:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19918 conditions, 3397 events. 1509/3397 cut-off events. For 35093/35093 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27031 event pairs, 441 based on Foata normal form. 15/3412 useless extension candidates. Maximal degree in co-relation 19849. Up to 2079 conditions per place. [2023-11-29 05:27:07,583 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 212 selfloop transitions, 125 changer transitions 70/408 dead transitions. [2023-11-29 05:27:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 408 transitions, 9424 flow [2023-11-29 05:27:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:27:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:27:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2023-11-29 05:27:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3864734299516908 [2023-11-29 05:27:07,584 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 80 transitions. [2023-11-29 05:27:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 80 transitions. [2023-11-29 05:27:07,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:07,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 80 transitions. [2023-11-29 05:27:07,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 05:27:07,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:07,585 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:07,585 INFO L175 Difference]: Start difference. First operand has 213 places, 389 transitions, 8456 flow. Second operand 9 states and 80 transitions. [2023-11-29 05:27:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 408 transitions, 9424 flow [2023-11-29 05:27:07,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 408 transitions, 8912 flow, removed 189 selfloop flow, removed 13 redundant places. [2023-11-29 05:27:07,791 INFO L231 Difference]: Finished difference. Result has 203 places, 329 transitions, 6863 flow [2023-11-29 05:27:07,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6863, PETRI_PLACES=203, PETRI_TRANSITIONS=329} [2023-11-29 05:27:07,792 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 178 predicate places. [2023-11-29 05:27:07,792 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 329 transitions, 6863 flow [2023-11-29 05:27:07,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:07,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:07,792 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 05:27:07,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:07,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 05:27:07,993 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:07,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1852194413, now seen corresponding path program 18 times [2023-11-29 05:27:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:07,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990374400] [2023-11-29 05:27:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:07,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990374400] [2023-11-29 05:27:08,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990374400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77216085] [2023-11-29 05:27:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:27:08,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:08,093 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:27:08,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:27:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:08,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:08,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:08,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:08,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77216085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:08,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548180364] [2023-11-29 05:27:08,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:08,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:08,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:08,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:08,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 329 transitions, 6863 flow. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:08,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:08,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:09,455 INFO L124 PetriNetUnfolderBase]: 1584/3609 cut-off events. [2023-11-29 05:27:09,455 INFO L125 PetriNetUnfolderBase]: For 35013/35013 co-relation queries the response was YES. [2023-11-29 05:27:09,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19649 conditions, 3609 events. 1584/3609 cut-off events. For 35013/35013 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29623 event pairs, 345 based on Foata normal form. 15/3624 useless extension candidates. Maximal degree in co-relation 19590. Up to 1485 conditions per place. [2023-11-29 05:27:09,478 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 176 selfloop transitions, 209 changer transitions 34/420 dead transitions. [2023-11-29 05:27:09,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 420 transitions, 9116 flow [2023-11-29 05:27:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:27:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:27:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 115 transitions. [2023-11-29 05:27:09,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-29 05:27:09,479 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 115 transitions. [2023-11-29 05:27:09,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 115 transitions. [2023-11-29 05:27:09,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:09,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 115 transitions. [2023-11-29 05:27:09,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.846153846153847) internal successors, (115), 13 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:09,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:09,480 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:09,480 INFO L175 Difference]: Start difference. First operand has 203 places, 329 transitions, 6863 flow. Second operand 13 states and 115 transitions. [2023-11-29 05:27:09,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 420 transitions, 9116 flow [2023-11-29 05:27:09,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 420 transitions, 8771 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-11-29 05:27:09,696 INFO L231 Difference]: Finished difference. Result has 207 places, 351 transitions, 7768 flow [2023-11-29 05:27:09,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6564, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7768, PETRI_PLACES=207, PETRI_TRANSITIONS=351} [2023-11-29 05:27:09,696 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 182 predicate places. [2023-11-29 05:27:09,696 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 351 transitions, 7768 flow [2023-11-29 05:27:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:09,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:09,696 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 05:27:09,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:27:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 05:27:09,897 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 999625915, now seen corresponding path program 19 times [2023-11-29 05:27:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129819854] [2023-11-29 05:27:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129819854] [2023-11-29 05:27:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129819854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531880500] [2023-11-29 05:27:10,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:27:10,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:10,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:27:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:10,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:10,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:10,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531880500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:10,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092341738] [2023-11-29 05:27:10,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:10,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:10,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:10,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:10,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 351 transitions, 7768 flow. Second operand has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 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 05:27:10,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:10,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:10,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:11,309 INFO L124 PetriNetUnfolderBase]: 1444/3277 cut-off events. [2023-11-29 05:27:11,309 INFO L125 PetriNetUnfolderBase]: For 38210/38210 co-relation queries the response was YES. [2023-11-29 05:27:11,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19069 conditions, 3277 events. 1444/3277 cut-off events. For 38210/38210 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26245 event pairs, 419 based on Foata normal form. 12/3289 useless extension candidates. Maximal degree in co-relation 19008. Up to 1987 conditions per place. [2023-11-29 05:27:11,340 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 172 selfloop transitions, 122 changer transitions 84/379 dead transitions. [2023-11-29 05:27:11,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 379 transitions, 8723 flow [2023-11-29 05:27:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:27:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:27:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2023-11-29 05:27:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2023-11-29 05:27:11,341 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 100 transitions. [2023-11-29 05:27:11,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 100 transitions. [2023-11-29 05:27:11,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:11,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 100 transitions. [2023-11-29 05:27:11,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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 05:27:11,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 23.0) internal successors, (299), 13 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:11,342 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 23.0) internal successors, (299), 13 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:11,342 INFO L175 Difference]: Start difference. First operand has 207 places, 351 transitions, 7768 flow. Second operand 12 states and 100 transitions. [2023-11-29 05:27:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 379 transitions, 8723 flow [2023-11-29 05:27:11,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 379 transitions, 8619 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-29 05:27:11,640 INFO L231 Difference]: Finished difference. Result has 211 places, 280 transitions, 6275 flow [2023-11-29 05:27:11,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6275, PETRI_PLACES=211, PETRI_TRANSITIONS=280} [2023-11-29 05:27:11,641 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2023-11-29 05:27:11,641 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 280 transitions, 6275 flow [2023-11-29 05:27:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 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 05:27:11,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:11,641 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 05:27:11,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:27:11,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 05:27:11,842 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:11,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:11,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1824985585, now seen corresponding path program 20 times [2023-11-29 05:27:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:11,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727465149] [2023-11-29 05:27:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:11,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727465149] [2023-11-29 05:27:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727465149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388351288] [2023-11-29 05:27:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:11,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:11,955 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:11,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:27:12,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:12,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:12,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:12,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:12,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:12,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388351288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:12,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:12,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:12,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298859493] [2023-11-29 05:27:12,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:12,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:12,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:12,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:12,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 280 transitions, 6275 flow. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:12,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:12,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:12,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:13,057 INFO L124 PetriNetUnfolderBase]: 1182/2684 cut-off events. [2023-11-29 05:27:13,057 INFO L125 PetriNetUnfolderBase]: For 30610/30610 co-relation queries the response was YES. [2023-11-29 05:27:13,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2684 events. 1182/2684 cut-off events. For 30610/30610 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20694 event pairs, 73 based on Foata normal form. 17/2701 useless extension candidates. Maximal degree in co-relation 15650. Up to 752 conditions per place. [2023-11-29 05:27:13,074 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 92 selfloop transitions, 170 changer transitions 69/332 dead transitions. [2023-11-29 05:27:13,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 332 transitions, 7459 flow [2023-11-29 05:27:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:27:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:27:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 129 transitions. [2023-11-29 05:27:13,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35054347826086957 [2023-11-29 05:27:13,075 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 129 transitions. [2023-11-29 05:27:13,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 129 transitions. [2023-11-29 05:27:13,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:13,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 129 transitions. [2023-11-29 05:27:13,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.0625) internal successors, (129), 16 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,076 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,076 INFO L175 Difference]: Start difference. First operand has 211 places, 280 transitions, 6275 flow. Second operand 16 states and 129 transitions. [2023-11-29 05:27:13,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 332 transitions, 7459 flow [2023-11-29 05:27:13,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 332 transitions, 6905 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-11-29 05:27:13,206 INFO L231 Difference]: Finished difference. Result has 209 places, 240 transitions, 5272 flow [2023-11-29 05:27:13,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5272, PETRI_PLACES=209, PETRI_TRANSITIONS=240} [2023-11-29 05:27:13,206 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 184 predicate places. [2023-11-29 05:27:13,207 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 240 transitions, 5272 flow [2023-11-29 05:27:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:13,207 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 05:27:13,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:27:13,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 05:27:13,407 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:13,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:13,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1861064207, now seen corresponding path program 21 times [2023-11-29 05:27:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:13,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91941381] [2023-11-29 05:27:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:13,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:13,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91941381] [2023-11-29 05:27:13,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91941381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:13,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157409818] [2023-11-29 05:27:13,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:27:13,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:13,512 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:13,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:27:13,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:27:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:13,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:13,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:13,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157409818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:13,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995896722] [2023-11-29 05:27:13,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:13,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:13,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:13,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 240 transitions, 5272 flow. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:13,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:13,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:14,424 INFO L124 PetriNetUnfolderBase]: 888/1997 cut-off events. [2023-11-29 05:27:14,424 INFO L125 PetriNetUnfolderBase]: For 22347/22347 co-relation queries the response was YES. [2023-11-29 05:27:14,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12241 conditions, 1997 events. 888/1997 cut-off events. For 22347/22347 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14068 event pairs, 65 based on Foata normal form. 6/2003 useless extension candidates. Maximal degree in co-relation 12184. Up to 791 conditions per place. [2023-11-29 05:27:14,438 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 87 selfloop transitions, 152 changer transitions 27/267 dead transitions. [2023-11-29 05:27:14,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 267 transitions, 5973 flow [2023-11-29 05:27:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:27:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:27:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 108 transitions. [2023-11-29 05:27:14,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2023-11-29 05:27:14,439 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 108 transitions. [2023-11-29 05:27:14,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 108 transitions. [2023-11-29 05:27:14,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:14,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 108 transitions. [2023-11-29 05:27:14,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 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 05:27:14,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:14,440 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:14,440 INFO L175 Difference]: Start difference. First operand has 209 places, 240 transitions, 5272 flow. Second operand 14 states and 108 transitions. [2023-11-29 05:27:14,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 267 transitions, 5973 flow [2023-11-29 05:27:14,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 267 transitions, 5539 flow, removed 15 selfloop flow, removed 15 redundant places. [2023-11-29 05:27:14,560 INFO L231 Difference]: Finished difference. Result has 203 places, 222 transitions, 4763 flow [2023-11-29 05:27:14,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4763, PETRI_PLACES=203, PETRI_TRANSITIONS=222} [2023-11-29 05:27:14,561 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 178 predicate places. [2023-11-29 05:27:14,561 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 222 transitions, 4763 flow [2023-11-29 05:27:14,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:14,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:14,561 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 05:27:14,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:14,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:14,762 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:14,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -440241743, now seen corresponding path program 22 times [2023-11-29 05:27:14,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:14,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389886836] [2023-11-29 05:27:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:14,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389886836] [2023-11-29 05:27:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389886836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624779726] [2023-11-29 05:27:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:27:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:14,864 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:27:14,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:27:14,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:14,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:14,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:15,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:15,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624779726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:15,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:15,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 05:27:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641593234] [2023-11-29 05:27:15,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:15,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 222 transitions, 4763 flow. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:27:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:15,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:15,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:15,817 INFO L124 PetriNetUnfolderBase]: 800/1767 cut-off events. [2023-11-29 05:27:15,817 INFO L125 PetriNetUnfolderBase]: For 18317/18317 co-relation queries the response was YES. [2023-11-29 05:27:15,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10846 conditions, 1767 events. 800/1767 cut-off events. For 18317/18317 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11890 event pairs, 37 based on Foata normal form. 8/1775 useless extension candidates. Maximal degree in co-relation 10792. Up to 575 conditions per place. [2023-11-29 05:27:15,827 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 76 selfloop transitions, 91 changer transitions 84/252 dead transitions. [2023-11-29 05:27:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 252 transitions, 5456 flow [2023-11-29 05:27:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:27:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:27:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 108 transitions. [2023-11-29 05:27:15,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2023-11-29 05:27:15,828 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 108 transitions. [2023-11-29 05:27:15,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 108 transitions. [2023-11-29 05:27:15,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:15,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 108 transitions. [2023-11-29 05:27:15,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 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 05:27:15,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:15,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:15,829 INFO L175 Difference]: Start difference. First operand has 203 places, 222 transitions, 4763 flow. Second operand 14 states and 108 transitions. [2023-11-29 05:27:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 252 transitions, 5456 flow [2023-11-29 05:27:15,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 252 transitions, 5021 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-11-29 05:27:15,894 INFO L231 Difference]: Finished difference. Result has 199 places, 154 transitions, 3008 flow [2023-11-29 05:27:15,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3008, PETRI_PLACES=199, PETRI_TRANSITIONS=154} [2023-11-29 05:27:15,895 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 174 predicate places. [2023-11-29 05:27:15,895 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 154 transitions, 3008 flow [2023-11-29 05:27:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 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 05:27:15,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:15,895 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 05:27:15,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:27:16,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:16,096 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash 354844133, now seen corresponding path program 23 times [2023-11-29 05:27:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367342660] [2023-11-29 05:27:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:16,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367342660] [2023-11-29 05:27:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367342660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499680646] [2023-11-29 05:27:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:27:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:16,185 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:16,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:27:16,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:16,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:16,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:27:16,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:16,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:27:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499680646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:27:16,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:27:16,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-29 05:27:16,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633336461] [2023-11-29 05:27:16,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:27:16,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:27:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:16,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:27:16,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:27:16,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:16,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 154 transitions, 3008 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:16,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:16,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:16,568 INFO L124 PetriNetUnfolderBase]: 529/1210 cut-off events. [2023-11-29 05:27:16,568 INFO L125 PetriNetUnfolderBase]: For 12610/12610 co-relation queries the response was YES. [2023-11-29 05:27:16,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 1210 events. 529/1210 cut-off events. For 12610/12610 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7572 event pairs, 164 based on Foata normal form. 4/1214 useless extension candidates. Maximal degree in co-relation 6828. Up to 723 conditions per place. [2023-11-29 05:27:16,590 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 108 selfloop transitions, 49 changer transitions 15/173 dead transitions. [2023-11-29 05:27:16,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 173 transitions, 3435 flow [2023-11-29 05:27:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:27:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:27:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2023-11-29 05:27:16,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961352657004831 [2023-11-29 05:27:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 82 transitions. [2023-11-29 05:27:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 82 transitions. [2023-11-29 05:27:16,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:16,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 82 transitions. [2023-11-29 05:27:16,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,592 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,592 INFO L175 Difference]: Start difference. First operand has 199 places, 154 transitions, 3008 flow. Second operand 9 states and 82 transitions. [2023-11-29 05:27:16,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 173 transitions, 3435 flow [2023-11-29 05:27:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 173 transitions, 3011 flow, removed 34 selfloop flow, removed 22 redundant places. [2023-11-29 05:27:16,626 INFO L231 Difference]: Finished difference. Result has 169 places, 146 transitions, 2550 flow [2023-11-29 05:27:16,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2550, PETRI_PLACES=169, PETRI_TRANSITIONS=146} [2023-11-29 05:27:16,626 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 144 predicate places. [2023-11-29 05:27:16,626 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 146 transitions, 2550 flow [2023-11-29 05:27:16,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:16,626 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] [2023-11-29 05:27:16,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:27:16,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:16,827 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:16,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash 89426311, now seen corresponding path program 24 times [2023-11-29 05:27:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:16,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172967945] [2023-11-29 05:27:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:16,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:16,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172967945] [2023-11-29 05:27:16,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172967945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126854287] [2023-11-29 05:27:16,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:27:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:16,917 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:16,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:27:16,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:27:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:16,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:16,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:17,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126854287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:17,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:27:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017208373] [2023-11-29 05:27:17,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:27:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:27:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:27:17,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:17,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 146 transitions, 2550 flow. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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 05:27:17,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:17,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:17,841 INFO L124 PetriNetUnfolderBase]: 481/1082 cut-off events. [2023-11-29 05:27:17,842 INFO L125 PetriNetUnfolderBase]: For 8664/8664 co-relation queries the response was YES. [2023-11-29 05:27:17,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5904 conditions, 1082 events. 481/1082 cut-off events. For 8664/8664 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6495 event pairs, 41 based on Foata normal form. 6/1088 useless extension candidates. Maximal degree in co-relation 5858. Up to 291 conditions per place. [2023-11-29 05:27:17,848 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 62 selfloop transitions, 91 changer transitions 40/194 dead transitions. [2023-11-29 05:27:17,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 194 transitions, 3163 flow [2023-11-29 05:27:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:27:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:27:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 165 transitions. [2023-11-29 05:27:17,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2023-11-29 05:27:17,849 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 165 transitions. [2023-11-29 05:27:17,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 165 transitions. [2023-11-29 05:27:17,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:17,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 165 transitions. [2023-11-29 05:27:17,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:17,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 23.0) internal successors, (529), 23 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:17,850 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 23.0) internal successors, (529), 23 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:17,850 INFO L175 Difference]: Start difference. First operand has 169 places, 146 transitions, 2550 flow. Second operand 22 states and 165 transitions. [2023-11-29 05:27:17,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 194 transitions, 3163 flow [2023-11-29 05:27:17,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 194 transitions, 2953 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-11-29 05:27:17,876 INFO L231 Difference]: Finished difference. Result has 181 places, 127 transitions, 2245 flow [2023-11-29 05:27:17,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2245, PETRI_PLACES=181, PETRI_TRANSITIONS=127} [2023-11-29 05:27:17,876 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 156 predicate places. [2023-11-29 05:27:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 127 transitions, 2245 flow [2023-11-29 05:27:17,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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 05:27:17,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:17,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:27:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:18,077 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:18,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 497799667, now seen corresponding path program 25 times [2023-11-29 05:27:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:18,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127568955] [2023-11-29 05:27:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127568955] [2023-11-29 05:27:18,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127568955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472959892] [2023-11-29 05:27:18,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:27:18,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:18,116 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:18,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:27:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:18,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:27:18,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:18,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472959892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:18,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 05:27:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484899302] [2023-11-29 05:27:18,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:18,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:27:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:27:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:27:18,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:27:18,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 127 transitions, 2245 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 05:27:18,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:18,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:27:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:18,510 INFO L124 PetriNetUnfolderBase]: 289/698 cut-off events. [2023-11-29 05:27:18,510 INFO L125 PetriNetUnfolderBase]: For 7541/7541 co-relation queries the response was YES. [2023-11-29 05:27:18,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4325 conditions, 698 events. 289/698 cut-off events. For 7541/7541 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3875 event pairs, 71 based on Foata normal form. 14/706 useless extension candidates. Maximal degree in co-relation 4276. Up to 286 conditions per place. [2023-11-29 05:27:18,514 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 79 selfloop transitions, 48 changer transitions 7/162 dead transitions. [2023-11-29 05:27:18,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 162 transitions, 2725 flow [2023-11-29 05:27:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:27:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:27:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2023-11-29 05:27:18,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260869565217391 [2023-11-29 05:27:18,515 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 147 transitions. [2023-11-29 05:27:18,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 147 transitions. [2023-11-29 05:27:18,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:18,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 147 transitions. [2023-11-29 05:27:18,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 9.8) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:18,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:18,517 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:18,517 INFO L175 Difference]: Start difference. First operand has 181 places, 127 transitions, 2245 flow. Second operand 15 states and 147 transitions. [2023-11-29 05:27:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 162 transitions, 2725 flow [2023-11-29 05:27:18,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 162 transitions, 2439 flow, removed 26 selfloop flow, removed 22 redundant places. [2023-11-29 05:27:18,539 INFO L231 Difference]: Finished difference. Result has 166 places, 125 transitions, 2045 flow [2023-11-29 05:27:18,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2045, PETRI_PLACES=166, PETRI_TRANSITIONS=125} [2023-11-29 05:27:18,540 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 141 predicate places. [2023-11-29 05:27:18,540 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 125 transitions, 2045 flow [2023-11-29 05:27:18,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 05:27:18,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:18,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:18,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:18,740 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash 388328317, now seen corresponding path program 26 times [2023-11-29 05:27:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:18,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001683027] [2023-11-29 05:27:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:18,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:18,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001683027] [2023-11-29 05:27:18,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001683027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:18,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600896864] [2023-11-29 05:27:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:18,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:18,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:18,786 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:18,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:27:18,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:18,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:18,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:27:18,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:18,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:19,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600896864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:19,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 23 [2023-11-29 05:27:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839258604] [2023-11-29 05:27:19,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:27:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:27:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:27:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 125 transitions, 2045 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:19,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:19,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:19,933 INFO L124 PetriNetUnfolderBase]: 412/867 cut-off events. [2023-11-29 05:27:19,933 INFO L125 PetriNetUnfolderBase]: For 8695/8695 co-relation queries the response was YES. [2023-11-29 05:27:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5077 conditions, 867 events. 412/867 cut-off events. For 8695/8695 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4462 event pairs, 98 based on Foata normal form. 7/874 useless extension candidates. Maximal degree in co-relation 5028. Up to 341 conditions per place. [2023-11-29 05:27:19,938 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 99 selfloop transitions, 89 changer transitions 20/209 dead transitions. [2023-11-29 05:27:19,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 209 transitions, 3229 flow [2023-11-29 05:27:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:27:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 05:27:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 200 transitions. [2023-11-29 05:27:19,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.322061191626409 [2023-11-29 05:27:19,939 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 200 transitions. [2023-11-29 05:27:19,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 200 transitions. [2023-11-29 05:27:19,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:19,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 200 transitions. [2023-11-29 05:27:19,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.407407407407407) internal successors, (200), 27 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:19,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:19,940 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 23.0) internal successors, (644), 28 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:19,940 INFO L175 Difference]: Start difference. First operand has 166 places, 125 transitions, 2045 flow. Second operand 27 states and 200 transitions. [2023-11-29 05:27:19,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 209 transitions, 3229 flow [2023-11-29 05:27:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 209 transitions, 3013 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-11-29 05:27:19,965 INFO L231 Difference]: Finished difference. Result has 190 places, 150 transitions, 2596 flow [2023-11-29 05:27:19,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2596, PETRI_PLACES=190, PETRI_TRANSITIONS=150} [2023-11-29 05:27:19,965 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 165 predicate places. [2023-11-29 05:27:19,965 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 150 transitions, 2596 flow [2023-11-29 05:27:19,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:19,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:19,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:19,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:27:20,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 05:27:20,166 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:20,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash 553501284, now seen corresponding path program 27 times [2023-11-29 05:27:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:20,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523227551] [2023-11-29 05:27:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523227551] [2023-11-29 05:27:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523227551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915916273] [2023-11-29 05:27:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:27:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:20,203 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:20,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:27:20,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:27:20,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:20,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:27:20,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915916273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:20,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2023-11-29 05:27:20,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783383948] [2023-11-29 05:27:20,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:27:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:27:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:27:20,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:27:20,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 150 transitions, 2596 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:20,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:20,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:27:20,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:20,532 INFO L124 PetriNetUnfolderBase]: 313/704 cut-off events. [2023-11-29 05:27:20,532 INFO L125 PetriNetUnfolderBase]: For 8674/8674 co-relation queries the response was YES. [2023-11-29 05:27:20,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4561 conditions, 704 events. 313/704 cut-off events. For 8674/8674 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3642 event pairs, 87 based on Foata normal form. 10/710 useless extension candidates. Maximal degree in co-relation 4502. Up to 287 conditions per place. [2023-11-29 05:27:20,537 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 100 selfloop transitions, 33 changer transitions 7/167 dead transitions. [2023-11-29 05:27:20,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 167 transitions, 3009 flow [2023-11-29 05:27:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:27:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:27:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 05:27:20,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-11-29 05:27:20,538 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 05:27:20,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 05:27:20,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:20,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 05:27:20,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 05:27:20,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:20,538 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:20,538 INFO L175 Difference]: Start difference. First operand has 190 places, 150 transitions, 2596 flow. Second operand 9 states and 88 transitions. [2023-11-29 05:27:20,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 167 transitions, 3009 flow [2023-11-29 05:27:20,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 167 transitions, 2819 flow, removed 68 selfloop flow, removed 11 redundant places. [2023-11-29 05:27:20,566 INFO L231 Difference]: Finished difference. Result has 183 places, 150 transitions, 2497 flow [2023-11-29 05:27:20,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2497, PETRI_PLACES=183, PETRI_TRANSITIONS=150} [2023-11-29 05:27:20,566 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 158 predicate places. [2023-11-29 05:27:20,566 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 150 transitions, 2497 flow [2023-11-29 05:27:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:20,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:20,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:20,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:20,767 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:20,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -252738000, now seen corresponding path program 28 times [2023-11-29 05:27:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282853588] [2023-11-29 05:27:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282853588] [2023-11-29 05:27:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282853588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589621372] [2023-11-29 05:27:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:27:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:20,806 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:27:20,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:27:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:20,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:27:20,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:20,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589621372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:20,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:20,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 05:27:20,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543920997] [2023-11-29 05:27:20,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:20,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:27:20,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:27:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:27:20,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:27:20,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 150 transitions, 2497 flow. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:20,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:20,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:27:20,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:21,172 INFO L124 PetriNetUnfolderBase]: 290/636 cut-off events. [2023-11-29 05:27:21,172 INFO L125 PetriNetUnfolderBase]: For 7591/7591 co-relation queries the response was YES. [2023-11-29 05:27:21,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4137 conditions, 636 events. 290/636 cut-off events. For 7591/7591 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3038 event pairs, 74 based on Foata normal form. 10/642 useless extension candidates. Maximal degree in co-relation 4077. Up to 258 conditions per place. [2023-11-29 05:27:21,177 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 95 selfloop transitions, 48 changer transitions 5/169 dead transitions. [2023-11-29 05:27:21,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 169 transitions, 2913 flow [2023-11-29 05:27:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:27:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:27:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 121 transitions. [2023-11-29 05:27:21,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40468227424749165 [2023-11-29 05:27:21,178 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 121 transitions. [2023-11-29 05:27:21,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 121 transitions. [2023-11-29 05:27:21,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:21,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 121 transitions. [2023-11-29 05:27:21,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 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 05:27:21,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:21,179 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:21,179 INFO L175 Difference]: Start difference. First operand has 183 places, 150 transitions, 2497 flow. Second operand 13 states and 121 transitions. [2023-11-29 05:27:21,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 169 transitions, 2913 flow [2023-11-29 05:27:21,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 169 transitions, 2807 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-11-29 05:27:21,206 INFO L231 Difference]: Finished difference. Result has 190 places, 149 transitions, 2510 flow [2023-11-29 05:27:21,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2510, PETRI_PLACES=190, PETRI_TRANSITIONS=149} [2023-11-29 05:27:21,206 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 165 predicate places. [2023-11-29 05:27:21,206 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 149 transitions, 2510 flow [2023-11-29 05:27:21,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:21,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:21,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:21,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:27:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 05:27:21,407 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:21,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 841528218, now seen corresponding path program 29 times [2023-11-29 05:27:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227507097] [2023-11-29 05:27:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:21,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:21,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227507097] [2023-11-29 05:27:21,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227507097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:21,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064509234] [2023-11-29 05:27:21,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:27:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:21,523 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:27:21,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:27:21,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:21,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:27:21,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:27:21,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:27:21,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064509234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:21,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 21 [2023-11-29 05:27:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310505999] [2023-11-29 05:27:21,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:27:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:27:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:27:21,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:21,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 149 transitions, 2510 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:21,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:21,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:21,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:22,212 INFO L124 PetriNetUnfolderBase]: 334/678 cut-off events. [2023-11-29 05:27:22,212 INFO L125 PetriNetUnfolderBase]: For 6881/6881 co-relation queries the response was YES. [2023-11-29 05:27:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4358 conditions, 678 events. 334/678 cut-off events. For 6881/6881 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3053 event pairs, 27 based on Foata normal form. 2/680 useless extension candidates. Maximal degree in co-relation 4295. Up to 161 conditions per place. [2023-11-29 05:27:22,216 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 57 selfloop transitions, 37 changer transitions 87/182 dead transitions. [2023-11-29 05:27:22,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 182 transitions, 2998 flow [2023-11-29 05:27:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:27:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:27:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2023-11-29 05:27:22,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342391304347826 [2023-11-29 05:27:22,217 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 123 transitions. [2023-11-29 05:27:22,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 123 transitions. [2023-11-29 05:27:22,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:22,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 123 transitions. [2023-11-29 05:27:22,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:22,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:22,218 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 23.0) internal successors, (391), 17 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:22,218 INFO L175 Difference]: Start difference. First operand has 190 places, 149 transitions, 2510 flow. Second operand 16 states and 123 transitions. [2023-11-29 05:27:22,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 182 transitions, 2998 flow [2023-11-29 05:27:22,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 182 transitions, 2908 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-29 05:27:22,247 INFO L231 Difference]: Finished difference. Result has 200 places, 77 transitions, 1167 flow [2023-11-29 05:27:22,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1167, PETRI_PLACES=200, PETRI_TRANSITIONS=77} [2023-11-29 05:27:22,248 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2023-11-29 05:27:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 77 transitions, 1167 flow [2023-11-29 05:27:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:22,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:22,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:27:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 05:27:22,448 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:22,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash 502631392, now seen corresponding path program 30 times [2023-11-29 05:27:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:22,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901633880] [2023-11-29 05:27:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:22,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:22,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:22,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901633880] [2023-11-29 05:27:22,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901633880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:22,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673463947] [2023-11-29 05:27:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:27:22,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:22,569 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:22,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:27:22,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:27:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:22,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:22,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:22,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:23,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673463947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:23,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:23,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-29 05:27:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98273643] [2023-11-29 05:27:23,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:23,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:27:23,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:27:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:27:23,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:23,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 77 transitions, 1167 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:23,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:23,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:23,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:23,803 INFO L124 PetriNetUnfolderBase]: 221/481 cut-off events. [2023-11-29 05:27:23,803 INFO L125 PetriNetUnfolderBase]: For 4677/4677 co-relation queries the response was YES. [2023-11-29 05:27:23,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 481 events. 221/481 cut-off events. For 4677/4677 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2060 event pairs, 19 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 3040. Up to 131 conditions per place. [2023-11-29 05:27:23,806 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 59 selfloop transitions, 46 changer transitions 55/161 dead transitions. [2023-11-29 05:27:23,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 161 transitions, 2242 flow [2023-11-29 05:27:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:27:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 05:27:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 218 transitions. [2023-11-29 05:27:23,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30575035063113604 [2023-11-29 05:27:23,807 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 218 transitions. [2023-11-29 05:27:23,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 218 transitions. [2023-11-29 05:27:23,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:23,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 218 transitions. [2023-11-29 05:27:23,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.032258064516129) internal successors, (218), 31 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:23,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 23.0) internal successors, (736), 32 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:23,809 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 23.0) internal successors, (736), 32 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:23,809 INFO L175 Difference]: Start difference. First operand has 200 places, 77 transitions, 1167 flow. Second operand 31 states and 218 transitions. [2023-11-29 05:27:23,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 161 transitions, 2242 flow [2023-11-29 05:27:23,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 161 transitions, 1671 flow, removed 70 selfloop flow, removed 41 redundant places. [2023-11-29 05:27:23,823 INFO L231 Difference]: Finished difference. Result has 166 places, 73 transitions, 951 flow [2023-11-29 05:27:23,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=951, PETRI_PLACES=166, PETRI_TRANSITIONS=73} [2023-11-29 05:27:23,824 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 141 predicate places. [2023-11-29 05:27:23,824 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 73 transitions, 951 flow [2023-11-29 05:27:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:23,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:23,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:23,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:27:24,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 05:27:24,024 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:24,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash -984470228, now seen corresponding path program 31 times [2023-11-29 05:27:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:24,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526141725] [2023-11-29 05:27:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:24,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526141725] [2023-11-29 05:27:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526141725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600383295] [2023-11-29 05:27:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:27:24,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:24,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:24,146 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:24,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:27:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:24,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:24,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:24,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600383295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:24,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:24,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-11-29 05:27:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223344192] [2023-11-29 05:27:24,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:24,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:27:24,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:27:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:27:24,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:24,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 73 transitions, 951 flow. Second operand has 27 states, 27 states have (on average 4.444444444444445) internal successors, (120), 27 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:24,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:24,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:24,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:25,050 INFO L124 PetriNetUnfolderBase]: 188/414 cut-off events. [2023-11-29 05:27:25,050 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-11-29 05:27:25,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 414 events. 188/414 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1765 event pairs, 31 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 2049. Up to 141 conditions per place. [2023-11-29 05:27:25,052 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 60 selfloop transitions, 35 changer transitions 17/113 dead transitions. [2023-11-29 05:27:25,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 113 transitions, 1325 flow [2023-11-29 05:27:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:27:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:27:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2023-11-29 05:27:25,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33248081841432225 [2023-11-29 05:27:25,053 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 130 transitions. [2023-11-29 05:27:25,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 130 transitions. [2023-11-29 05:27:25,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:25,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 130 transitions. [2023-11-29 05:27:25,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:25,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:25,055 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:25,055 INFO L175 Difference]: Start difference. First operand has 166 places, 73 transitions, 951 flow. Second operand 17 states and 130 transitions. [2023-11-29 05:27:25,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 113 transitions, 1325 flow [2023-11-29 05:27:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 113 transitions, 1036 flow, removed 37 selfloop flow, removed 28 redundant places. [2023-11-29 05:27:25,063 INFO L231 Difference]: Finished difference. Result has 139 places, 71 transitions, 727 flow [2023-11-29 05:27:25,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=727, PETRI_PLACES=139, PETRI_TRANSITIONS=71} [2023-11-29 05:27:25,064 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 114 predicate places. [2023-11-29 05:27:25,064 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 71 transitions, 727 flow [2023-11-29 05:27:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.444444444444445) internal successors, (120), 27 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:25,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:25,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:25,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:25,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:25,264 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:25,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -670206208, now seen corresponding path program 32 times [2023-11-29 05:27:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:25,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743081881] [2023-11-29 05:27:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:25,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:25,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:25,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743081881] [2023-11-29 05:27:25,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743081881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:25,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533758954] [2023-11-29 05:27:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:25,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:25,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:25,391 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:25,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:27:25,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:25,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:25,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:25,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533758954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:25,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:25,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-11-29 05:27:25,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690919313] [2023-11-29 05:27:25,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:25,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:27:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:27:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:27:25,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:25,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 71 transitions, 727 flow. Second operand has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:25,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:25,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:25,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:26,245 INFO L124 PetriNetUnfolderBase]: 167/375 cut-off events. [2023-11-29 05:27:26,245 INFO L125 PetriNetUnfolderBase]: For 1130/1130 co-relation queries the response was YES. [2023-11-29 05:27:26,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 375 events. 167/375 cut-off events. For 1130/1130 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1550 event pairs, 39 based on Foata normal form. 2/377 useless extension candidates. Maximal degree in co-relation 1646. Up to 129 conditions per place. [2023-11-29 05:27:26,247 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 38 selfloop transitions, 22 changer transitions 43/104 dead transitions. [2023-11-29 05:27:26,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 104 transitions, 1015 flow [2023-11-29 05:27:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:27:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:27:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 125 transitions. [2023-11-29 05:27:26,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.319693094629156 [2023-11-29 05:27:26,248 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 125 transitions. [2023-11-29 05:27:26,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 125 transitions. [2023-11-29 05:27:26,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:26,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 125 transitions. [2023-11-29 05:27:26,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:26,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:26,249 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:26,249 INFO L175 Difference]: Start difference. First operand has 139 places, 71 transitions, 727 flow. Second operand 17 states and 125 transitions. [2023-11-29 05:27:26,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 104 transitions, 1015 flow [2023-11-29 05:27:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 104 transitions, 941 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-11-29 05:27:26,254 INFO L231 Difference]: Finished difference. Result has 134 places, 54 transitions, 531 flow [2023-11-29 05:27:26,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=531, PETRI_PLACES=134, PETRI_TRANSITIONS=54} [2023-11-29 05:27:26,254 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 109 predicate places. [2023-11-29 05:27:26,254 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 54 transitions, 531 flow [2023-11-29 05:27:26,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:26,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:26,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:26,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:26,455 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:26,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1949502636, now seen corresponding path program 33 times [2023-11-29 05:27:26,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:26,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070073335] [2023-11-29 05:27:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:26,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070073335] [2023-11-29 05:27:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070073335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749680523] [2023-11-29 05:27:26,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:27:26,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:26,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:26,573 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:26,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:27:26,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:27:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:26,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:26,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:26,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749680523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:27,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-11-29 05:27:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860614833] [2023-11-29 05:27:27,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:27:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:27:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:27:27,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:27,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 54 transitions, 531 flow. Second operand has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 28 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:27,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:27,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:27,425 INFO L124 PetriNetUnfolderBase]: 114/252 cut-off events. [2023-11-29 05:27:27,425 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-11-29 05:27:27,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 252 events. 114/252 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 860 event pairs, 2 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 1135. Up to 53 conditions per place. [2023-11-29 05:27:27,427 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 37 selfloop transitions, 14 changer transitions 34/86 dead transitions. [2023-11-29 05:27:27,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 86 transitions, 775 flow [2023-11-29 05:27:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:27:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:27:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 109 transitions. [2023-11-29 05:27:27,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159420289855073 [2023-11-29 05:27:27,428 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 109 transitions. [2023-11-29 05:27:27,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 109 transitions. [2023-11-29 05:27:27,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:27,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 109 transitions. [2023-11-29 05:27:27,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,429 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,429 INFO L175 Difference]: Start difference. First operand has 134 places, 54 transitions, 531 flow. Second operand 15 states and 109 transitions. [2023-11-29 05:27:27,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 86 transitions, 775 flow [2023-11-29 05:27:27,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 86 transitions, 626 flow, removed 9 selfloop flow, removed 21 redundant places. [2023-11-29 05:27:27,433 INFO L231 Difference]: Finished difference. Result has 105 places, 31 transitions, 211 flow [2023-11-29 05:27:27,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=211, PETRI_PLACES=105, PETRI_TRANSITIONS=31} [2023-11-29 05:27:27,433 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 80 predicate places. [2023-11-29 05:27:27,433 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 31 transitions, 211 flow [2023-11-29 05:27:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 28 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:27,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:27,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-29 05:27:27,634 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:27,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1202988952, now seen corresponding path program 34 times [2023-11-29 05:27:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568125478] [2023-11-29 05:27:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:27,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:27,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568125478] [2023-11-29 05:27:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568125478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143411193] [2023-11-29 05:27:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:27:27,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:27,750 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:27:27,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:27:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:27,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:27,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:27,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143411193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:28,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-11-29 05:27:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922371508] [2023-11-29 05:27:28,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:28,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:27:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:27:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:27:28,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:28,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 31 transitions, 211 flow. Second operand has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:28,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:28,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:28,516 INFO L124 PetriNetUnfolderBase]: 49/118 cut-off events. [2023-11-29 05:27:28,516 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-29 05:27:28,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 118 events. 49/118 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 281 event pairs, 0 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 447. Up to 27 conditions per place. [2023-11-29 05:27:28,517 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 26 selfloop transitions, 12 changer transitions 14/53 dead transitions. [2023-11-29 05:27:28,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 53 transitions, 362 flow [2023-11-29 05:27:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:27:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:27:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 91 transitions. [2023-11-29 05:27:28,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2826086956521739 [2023-11-29 05:27:28,518 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 91 transitions. [2023-11-29 05:27:28,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 91 transitions. [2023-11-29 05:27:28,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:28,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 91 transitions. [2023-11-29 05:27:28,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 6.5) internal successors, (91), 14 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 05:27:28,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,519 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,519 INFO L175 Difference]: Start difference. First operand has 105 places, 31 transitions, 211 flow. Second operand 14 states and 91 transitions. [2023-11-29 05:27:28,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 53 transitions, 362 flow [2023-11-29 05:27:28,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 53 transitions, 274 flow, removed 6 selfloop flow, removed 29 redundant places. [2023-11-29 05:27:28,520 INFO L231 Difference]: Finished difference. Result has 78 places, 27 transitions, 125 flow [2023-11-29 05:27:28,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=125, PETRI_PLACES=78, PETRI_TRANSITIONS=27} [2023-11-29 05:27:28,521 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-29 05:27:28,521 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 27 transitions, 125 flow [2023-11-29 05:27:28,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.392857142857143) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:28,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:28,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:28,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 05:27:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-29 05:27:28,722 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:28,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash -988461260, now seen corresponding path program 35 times [2023-11-29 05:27:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:28,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496709447] [2023-11-29 05:27:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:28,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496709447] [2023-11-29 05:27:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496709447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639552048] [2023-11-29 05:27:28,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:27:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:28,851 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:28,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 05:27:28,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:27:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:28,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:27:28,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:27:29,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:27:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639552048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:27:29,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:27:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 17 [2023-11-29 05:27:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539916272] [2023-11-29 05:27:29,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:27:29,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:27:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:27:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:27:29,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2023-11-29 05:27:29,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 27 transitions, 125 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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 05:27:29,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:29,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2023-11-29 05:27:29,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:29,084 INFO L124 PetriNetUnfolderBase]: 31/77 cut-off events. [2023-11-29 05:27:29,084 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-29 05:27:29,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 77 events. 31/77 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 1 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 257. Up to 25 conditions per place. [2023-11-29 05:27:29,084 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-11-29 05:27:29,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 34 transitions, 206 flow [2023-11-29 05:27:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:27:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:27:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 57 transitions. [2023-11-29 05:27:29,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2753623188405797 [2023-11-29 05:27:29,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 57 transitions. [2023-11-29 05:27:29,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 57 transitions. [2023-11-29 05:27:29,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:29,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 57 transitions. [2023-11-29 05:27:29,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:29,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:29,086 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:29,086 INFO L175 Difference]: Start difference. First operand has 78 places, 27 transitions, 125 flow. Second operand 9 states and 57 transitions. [2023-11-29 05:27:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 34 transitions, 206 flow [2023-11-29 05:27:29,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 34 transitions, 177 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-29 05:27:29,086 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-11-29 05:27:29,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-11-29 05:27:29,087 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2023-11-29 05:27:29,087 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-11-29 05:27:29,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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 05:27:29,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-29 05:27:29,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-29 05:27:29,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-29 05:27:29,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 05:27:29,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 05:27:29,290 INFO L445 BasicCegarLoop]: Path program histogram: [35, 20, 5, 5] [2023-11-29 05:27:29,292 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 05:27:29,292 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:27:29,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:27:29 BasicIcfg [2023-11-29 05:27:29,296 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:27:29,296 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:27:29,296 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:27:29,296 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:27:29,296 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:26:27" (3/4) ... [2023-11-29 05:27:29,298 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 05:27:29,301 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 05:27:29,301 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 05:27:29,305 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 47 nodes and edges [2023-11-29 05:27:29,305 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-29 05:27:29,305 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-29 05:27:29,305 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 05:27:29,368 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 05:27:29,369 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 05:27:29,369 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:27:29,370 INFO L158 Benchmark]: Toolchain (without parser) took 63011.89ms. Allocated memory was 153.1MB in the beginning and 784.3MB in the end (delta: 631.2MB). Free memory was 115.3MB in the beginning and 541.2MB in the end (delta: -425.9MB). Peak memory consumption was 206.9MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,370 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:27:29,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.84ms. Allocated memory is still 153.1MB. Free memory was 114.8MB in the beginning and 103.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.48ms. Allocated memory is still 153.1MB. Free memory was 103.7MB in the beginning and 102.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,371 INFO L158 Benchmark]: Boogie Preprocessor took 34.81ms. Allocated memory is still 153.1MB. Free memory was 102.2MB in the beginning and 100.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,371 INFO L158 Benchmark]: RCFGBuilder took 398.83ms. Allocated memory is still 153.1MB. Free memory was 100.1MB in the beginning and 78.6MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,372 INFO L158 Benchmark]: TraceAbstraction took 62256.47ms. Allocated memory was 153.1MB in the beginning and 784.3MB in the end (delta: 631.2MB). Free memory was 78.1MB in the beginning and 545.4MB in the end (delta: -467.3MB). Peak memory consumption was 167.1MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,372 INFO L158 Benchmark]: Witness Printer took 73.12ms. Allocated memory is still 784.3MB. Free memory was 545.4MB in the beginning and 541.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:27:29,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 153.1MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.84ms. Allocated memory is still 153.1MB. Free memory was 114.8MB in the beginning and 103.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.48ms. Allocated memory is still 153.1MB. Free memory was 103.7MB in the beginning and 102.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.81ms. Allocated memory is still 153.1MB. Free memory was 102.2MB in the beginning and 100.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 398.83ms. Allocated memory is still 153.1MB. Free memory was 100.1MB in the beginning and 78.6MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 62256.47ms. Allocated memory was 153.1MB in the beginning and 784.3MB in the end (delta: 631.2MB). Free memory was 78.1MB in the beginning and 545.4MB in the end (delta: -467.3MB). Peak memory consumption was 167.1MB. Max. memory is 16.1GB. * Witness Printer took 73.12ms. Allocated memory is still 784.3MB. Free memory was 545.4MB in the beginning and 541.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 62.2s, OverallIterations: 65, TraceHistogramMax: 2, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 35.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3719 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3667 mSDsluCounter, 56 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 797 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25999 IncrementalHoareTripleChecker+Invalid, 26796 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 797 mSolverCounterUnsat, 12 mSDtfsCounter, 25999 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2445 GetRequests, 1092 SyntacticMatches, 4 SemanticMatches, 1349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10079 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8456occurred in iteration=46, InterpolantAutomatonStates: 886, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 15.7s InterpolantComputationTime, 2005 NumberOfCodeBlocks, 2005 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2527 ConstructedInterpolants, 0 QuantifiedInterpolants, 14139 SizeOfPredicates, 122 NumberOfNonLiveVariables, 4587 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 133 InterpolantComputations, 34 PerfectInterpolantSequences, 66/318 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 05:27:29,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecd4f79-ffe4-43bd-900a-4b7e63aeed5d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE