./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.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_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/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_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/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_22c98050-8760-4638-a3a7-53b68aaeff24/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:22:09,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:22:09,158 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:22:09,162 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:22:09,163 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:22:09,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:22:09,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:22:09,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:22:09,188 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:22:09,189 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:22:09,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:22:09,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:22:09,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:22:09,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:22:09,192 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:22:09,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:22:09,193 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:22:09,194 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:22:09,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:22:09,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:22:09,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:22:09,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:22:09,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:22:09,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:22:09,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:22:09,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:22:09,201 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:22:09,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:22:09,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:22:09,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:22:09,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:22:09,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:09,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:22:09,205 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:22:09,205 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:22:09,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:22:09,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:22:09,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:22:09,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:22:09,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:22:09,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:22:09,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:22:09,209 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_22c98050-8760-4638-a3a7-53b68aaeff24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2023-11-29 06:22:09,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:22:09,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:22:09,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:22:09,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:22:09,456 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:22:09,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/clever.wvr.c [2023-11-29 06:22:12,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:22:12,497 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:22:12,497 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/sv-benchmarks/c/weaver/clever.wvr.c [2023-11-29 06:22:12,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/data/f97e7518d/d8ef18654e214036a285e055a47f3810/FLAG6098db505 [2023-11-29 06:22:12,524 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/data/f97e7518d/d8ef18654e214036a285e055a47f3810 [2023-11-29 06:22:12,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:22:12,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:22:12,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:22:12,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:22:12,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:22:12,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d57647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12, skipping insertion in model container [2023-11-29 06:22:12,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:22:12,761 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_22c98050-8760-4638-a3a7-53b68aaeff24/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-29 06:22:12,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:22:12,779 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:22:12,802 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_22c98050-8760-4638-a3a7-53b68aaeff24/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-29 06:22:12,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:22:12,820 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:22:12,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12 WrapperNode [2023-11-29 06:22:12,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:22:12,822 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:22:12,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:22:12,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:22:12,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,861 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-11-29 06:22:12,862 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:22:12,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:22:12,863 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:22:12,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:22:12,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,903 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,928 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 06:22:12,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,943 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:22:12,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:22:12,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:22:12,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:22:12,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (1/1) ... [2023-11-29 06:22:12,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:12,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:12,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:22:12,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:22:13,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:22:13,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:22:13,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:22:13,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:22:13,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:22:13,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:22:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:22:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:22:13,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:22:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:22:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:22:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:22:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:22:13,024 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 06:22:13,136 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:22:13,138 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:22:13,358 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:22:13,609 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:22:13,610 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:22:13,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:13 BoogieIcfgContainer [2023-11-29 06:22:13,610 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:22:13,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:22:13,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:22:13,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:22:13,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:22:12" (1/3) ... [2023-11-29 06:22:13,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0944c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:13, skipping insertion in model container [2023-11-29 06:22:13,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:12" (2/3) ... [2023-11-29 06:22:13,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0944c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:13, skipping insertion in model container [2023-11-29 06:22:13,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:13" (3/3) ... [2023-11-29 06:22:13,621 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-11-29 06:22:13,630 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:22:13,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:22:13,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:22:13,643 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:22:13,681 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:22:13,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 06:22:13,761 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 06:22:13,762 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:22:13,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2023-11-29 06:22:13,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 06:22:13,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 06:22:13,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:22:13,788 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;@96a621a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:22:13,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:22:13,798 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:22:13,798 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 06:22:13,798 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:22:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:13,800 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 06:22:13,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1860028167, now seen corresponding path program 1 times [2023-11-29 06:22:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816138553] [2023-11-29 06:22:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:14,269 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 06:22:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816138553] [2023-11-29 06:22:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816138553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:14,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:22:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501198955] [2023-11-29 06:22:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:14,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:22:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:22:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:22:14,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:14,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:14,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:14,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:14,412 INFO L124 PetriNetUnfolderBase]: 112/182 cut-off events. [2023-11-29 06:22:14,412 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 06:22:14,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 182 events. 112/182 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 556 event pairs, 20 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 318. Up to 118 conditions per place. [2023-11-29 06:22:14,417 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 23 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-29 06:22:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 135 flow [2023-11-29 06:22:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:22:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:22:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2023-11-29 06:22:14,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2023-11-29 06:22:14,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2023-11-29 06:22:14,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2023-11-29 06:22:14,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:14,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2023-11-29 06:22:14,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 06:22:14,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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 06:22:14,444 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 43 transitions. [2023-11-29 06:22:14,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 135 flow [2023-11-29 06:22:14,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:22:14,450 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-29 06:22:14,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-29 06:22:14,455 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-29 06:22:14,455 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-29 06:22:14,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:14,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:14,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:22:14,457 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 06:22:14,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1746752640, now seen corresponding path program 1 times [2023-11-29 06:22:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837281028] [2023-11-29 06:22:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:14,561 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 06:22:14,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837281028] [2023-11-29 06:22:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837281028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:14,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:22:14,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693774029] [2023-11-29 06:22:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:14,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:22:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:22:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:22:14,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:14,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:14,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:14,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:14,713 INFO L124 PetriNetUnfolderBase]: 153/259 cut-off events. [2023-11-29 06:22:14,713 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-29 06:22:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 259 events. 153/259 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 885 event pairs, 14 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 184. Up to 102 conditions per place. [2023-11-29 06:22:14,717 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 7 changer transitions 2/52 dead transitions. [2023-11-29 06:22:14,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 52 transitions, 248 flow [2023-11-29 06:22:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:22:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:22:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2023-11-29 06:22:14,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2023-11-29 06:22:14,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 69 transitions. [2023-11-29 06:22:14,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 69 transitions. [2023-11-29 06:22:14,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:14,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 69 transitions. [2023-11-29 06:22:14,721 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 06:22:14,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,723 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 5 states and 69 transitions. [2023-11-29 06:22:14,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 52 transitions, 248 flow [2023-11-29 06:22:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 52 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:22:14,726 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 107 flow [2023-11-29 06:22:14,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-29 06:22:14,727 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-29 06:22:14,727 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 107 flow [2023-11-29 06:22:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:14,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:14,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:22:14,728 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 06:22:14,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1243436406, now seen corresponding path program 2 times [2023-11-29 06:22:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:14,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117514342] [2023-11-29 06:22:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:14,813 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 06:22:14,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117514342] [2023-11-29 06:22:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117514342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:14,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:22:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494647936] [2023-11-29 06:22:14,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:22:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:22:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:22:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:14,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:14,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:14,933 INFO L124 PetriNetUnfolderBase]: 153/252 cut-off events. [2023-11-29 06:22:14,933 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-11-29 06:22:14,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 252 events. 153/252 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 852 event pairs, 17 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 320. Up to 114 conditions per place. [2023-11-29 06:22:14,937 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 32 selfloop transitions, 11 changer transitions 6/52 dead transitions. [2023-11-29 06:22:14,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 307 flow [2023-11-29 06:22:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:22:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:22:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2023-11-29 06:22:14,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-29 06:22:14,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2023-11-29 06:22:14,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2023-11-29 06:22:14,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:14,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2023-11-29 06:22:14,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,943 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 107 flow. Second operand 5 states and 64 transitions. [2023-11-29 06:22:14,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 307 flow [2023-11-29 06:22:14,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 52 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:22:14,948 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 172 flow [2023-11-29 06:22:14,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-29 06:22:14,949 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-29 06:22:14,949 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 172 flow [2023-11-29 06:22:14,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:14,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:14,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:14,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:22:14,950 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 06:22:14,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1971060260, now seen corresponding path program 1 times [2023-11-29 06:22:14,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:14,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217085617] [2023-11-29 06:22:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:14,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217085617] [2023-11-29 06:22:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217085617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658033787] [2023-11-29 06:22:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:15,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:15,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:15,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:15,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:22:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:15,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:22:15,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:15,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:15,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658033787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:15,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:15,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 06:22:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445260539] [2023-11-29 06:22:15,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:15,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:22:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:22:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:22:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:15,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:15,418 INFO L124 PetriNetUnfolderBase]: 131/234 cut-off events. [2023-11-29 06:22:15,419 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-29 06:22:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 234 events. 131/234 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 732 event pairs, 2 based on Foata normal form. 20/251 useless extension candidates. Maximal degree in co-relation 523. Up to 96 conditions per place. [2023-11-29 06:22:15,423 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 43 selfloop transitions, 9 changer transitions 4/59 dead transitions. [2023-11-29 06:22:15,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 421 flow [2023-11-29 06:22:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:22:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:22:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2023-11-29 06:22:15,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-29 06:22:15,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 68 transitions. [2023-11-29 06:22:15,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 68 transitions. [2023-11-29 06:22:15,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:15,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 68 transitions. [2023-11-29 06:22:15,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,428 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 172 flow. Second operand 5 states and 68 transitions. [2023-11-29 06:22:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 421 flow [2023-11-29 06:22:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 415 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 06:22:15,435 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 244 flow [2023-11-29 06:22:15,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-11-29 06:22:15,436 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2023-11-29 06:22:15,436 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 244 flow [2023-11-29 06:22:15,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:15,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:22:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:15,640 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 06:22:15,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash -201000984, now seen corresponding path program 2 times [2023-11-29 06:22:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692456895] [2023-11-29 06:22:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692456895] [2023-11-29 06:22:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692456895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:15,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:22:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689566367] [2023-11-29 06:22:15,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:15,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:22:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:22:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:22:15,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:15,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:15,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:15,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:15,820 INFO L124 PetriNetUnfolderBase]: 119/210 cut-off events. [2023-11-29 06:22:15,820 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2023-11-29 06:22:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 210 events. 119/210 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 643 event pairs, 26 based on Foata normal form. 2/208 useless extension candidates. Maximal degree in co-relation 531. Up to 68 conditions per place. [2023-11-29 06:22:15,824 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 41 selfloop transitions, 9 changer transitions 2/55 dead transitions. [2023-11-29 06:22:15,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 450 flow [2023-11-29 06:22:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:22:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:22:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-29 06:22:15,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2023-11-29 06:22:15,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-29 06:22:15,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-29 06:22:15,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:15,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-29 06:22:15,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,828 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,828 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 244 flow. Second operand 5 states and 61 transitions. [2023-11-29 06:22:15,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 450 flow [2023-11-29 06:22:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 432 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 06:22:15,833 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 286 flow [2023-11-29 06:22:15,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-29 06:22:15,834 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-11-29 06:22:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 286 flow [2023-11-29 06:22:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:15,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:15,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:15,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:22:15,836 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 06:22:15,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash -50799515, now seen corresponding path program 1 times [2023-11-29 06:22:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365885167] [2023-11-29 06:22:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:16,163 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 06:22:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365885167] [2023-11-29 06:22:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365885167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:16,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269924109] [2023-11-29 06:22:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:16,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:16,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:22:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:16,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:16,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:16,571 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 06:22:16,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:16,751 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 06:22:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269924109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:16,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:16,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-29 06:22:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282792027] [2023-11-29 06:22:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:16,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:22:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:22:16,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:22:16,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:16,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:16,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:16,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:16,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:17,198 INFO L124 PetriNetUnfolderBase]: 252/438 cut-off events. [2023-11-29 06:22:17,199 INFO L125 PetriNetUnfolderBase]: For 1186/1186 co-relation queries the response was YES. [2023-11-29 06:22:17,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 438 events. 252/438 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1640 event pairs, 14 based on Foata normal form. 14/450 useless extension candidates. Maximal degree in co-relation 1306. Up to 180 conditions per place. [2023-11-29 06:22:17,204 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 67 selfloop transitions, 21 changer transitions 21/112 dead transitions. [2023-11-29 06:22:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 112 transitions, 1001 flow [2023-11-29 06:22:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:22:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:22:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2023-11-29 06:22:17,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-29 06:22:17,206 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 119 transitions. [2023-11-29 06:22:17,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 119 transitions. [2023-11-29 06:22:17,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:17,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 119 transitions. [2023-11-29 06:22:17,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:17,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:17,209 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:17,209 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 286 flow. Second operand 9 states and 119 transitions. [2023-11-29 06:22:17,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 112 transitions, 1001 flow [2023-11-29 06:22:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 112 transitions, 970 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-29 06:22:17,217 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 485 flow [2023-11-29 06:22:17,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-29 06:22:17,218 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-11-29 06:22:17,218 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 485 flow [2023-11-29 06:22:17,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:17,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:17,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:17,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:22:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:17,421 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 06:22:17,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash 316338317, now seen corresponding path program 2 times [2023-11-29 06:22:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610371710] [2023-11-29 06:22:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:17,758 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 06:22:17,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610371710] [2023-11-29 06:22:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610371710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786527769] [2023-11-29 06:22:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:17,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:22:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:17,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:17,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:17,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:18,159 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 06:22:18,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:18,331 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 06:22:18,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786527769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:18,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:18,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-29 06:22:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912982889] [2023-11-29 06:22:18,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:18,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:22:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:22:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:22:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:18,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 485 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:18,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:18,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:19,356 INFO L124 PetriNetUnfolderBase]: 680/1180 cut-off events. [2023-11-29 06:22:19,356 INFO L125 PetriNetUnfolderBase]: For 4122/4122 co-relation queries the response was YES. [2023-11-29 06:22:19,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5495 conditions, 1180 events. 680/1180 cut-off events. For 4122/4122 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5748 event pairs, 56 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 5414. Up to 343 conditions per place. [2023-11-29 06:22:19,369 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 145 selfloop transitions, 86 changer transitions 12/246 dead transitions. [2023-11-29 06:22:19,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 246 transitions, 2396 flow [2023-11-29 06:22:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:22:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:22:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 235 transitions. [2023-11-29 06:22:19,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6582633053221288 [2023-11-29 06:22:19,371 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 235 transitions. [2023-11-29 06:22:19,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 235 transitions. [2023-11-29 06:22:19,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:19,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 235 transitions. [2023-11-29 06:22:19,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:19,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:19,375 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:19,375 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 485 flow. Second operand 17 states and 235 transitions. [2023-11-29 06:22:19,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 246 transitions, 2396 flow [2023-11-29 06:22:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 246 transitions, 2269 flow, removed 60 selfloop flow, removed 3 redundant places. [2023-11-29 06:22:19,394 INFO L231 Difference]: Finished difference. Result has 81 places, 136 transitions, 1529 flow [2023-11-29 06:22:19,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1529, PETRI_PLACES=81, PETRI_TRANSITIONS=136} [2023-11-29 06:22:19,395 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 59 predicate places. [2023-11-29 06:22:19,395 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 136 transitions, 1529 flow [2023-11-29 06:22:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:19,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:19,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:19,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:22:19,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:22:19,596 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 06:22:19,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2124884647, now seen corresponding path program 3 times [2023-11-29 06:22:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:19,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777778689] [2023-11-29 06:22:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:19,904 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 06:22:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777778689] [2023-11-29 06:22:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777778689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619073775] [2023-11-29 06:22:19,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:22:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:19,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:19,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:22:20,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:22:20,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:20,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:20,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:20,236 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 06:22:20,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:20,388 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 06:22:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619073775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:20,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:20,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-29 06:22:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834481346] [2023-11-29 06:22:20,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:22:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:22:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:22:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:20,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 136 transitions, 1529 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:20,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:21,456 INFO L124 PetriNetUnfolderBase]: 1462/2543 cut-off events. [2023-11-29 06:22:21,456 INFO L125 PetriNetUnfolderBase]: For 12311/12311 co-relation queries the response was YES. [2023-11-29 06:22:21,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 2543 events. 1462/2543 cut-off events. For 12311/12311 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14523 event pairs, 156 based on Foata normal form. 7/2548 useless extension candidates. Maximal degree in co-relation 12185. Up to 699 conditions per place. [2023-11-29 06:22:21,490 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 188 selfloop transitions, 151 changer transitions 12/354 dead transitions. [2023-11-29 06:22:21,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 354 transitions, 4401 flow [2023-11-29 06:22:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:22:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:22:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2023-11-29 06:22:21,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2023-11-29 06:22:21,492 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 150 transitions. [2023-11-29 06:22:21,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 150 transitions. [2023-11-29 06:22:21,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:21,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 150 transitions. [2023-11-29 06:22:21,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:21,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:21,494 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:21,495 INFO L175 Difference]: Start difference. First operand has 81 places, 136 transitions, 1529 flow. Second operand 11 states and 150 transitions. [2023-11-29 06:22:21,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 354 transitions, 4401 flow [2023-11-29 06:22:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 354 transitions, 4173 flow, removed 111 selfloop flow, removed 2 redundant places. [2023-11-29 06:22:21,546 INFO L231 Difference]: Finished difference. Result has 94 places, 242 transitions, 3255 flow [2023-11-29 06:22:21,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3255, PETRI_PLACES=94, PETRI_TRANSITIONS=242} [2023-11-29 06:22:21,547 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2023-11-29 06:22:21,547 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 242 transitions, 3255 flow [2023-11-29 06:22:21,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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 06:22:21,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:21,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:21,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:22:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:21,750 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 06:22:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1309036107, now seen corresponding path program 1 times [2023-11-29 06:22:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790860133] [2023-11-29 06:22:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:22,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:22,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790860133] [2023-11-29 06:22:22,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790860133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:22,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162708708] [2023-11-29 06:22:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:22,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:22,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:22,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:22:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:22,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:22:22,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:22,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:23,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162708708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:23,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:23,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2023-11-29 06:22:23,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971310837] [2023-11-29 06:22:23,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:22:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:22:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:22:23,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:23,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 242 transitions, 3255 flow. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:23,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:23,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:23,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:25,506 INFO L124 PetriNetUnfolderBase]: 2284/3967 cut-off events. [2023-11-29 06:22:25,506 INFO L125 PetriNetUnfolderBase]: For 26573/26573 co-relation queries the response was YES. [2023-11-29 06:22:25,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22902 conditions, 3967 events. 2284/3967 cut-off events. For 26573/26573 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23389 event pairs, 234 based on Foata normal form. 16/3981 useless extension candidates. Maximal degree in co-relation 22176. Up to 2325 conditions per place. [2023-11-29 06:22:25,562 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 321 selfloop transitions, 162 changer transitions 6/492 dead transitions. [2023-11-29 06:22:25,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 492 transitions, 7045 flow [2023-11-29 06:22:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:22:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:22:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 214 transitions. [2023-11-29 06:22:25,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2023-11-29 06:22:25,564 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 214 transitions. [2023-11-29 06:22:25,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 214 transitions. [2023-11-29 06:22:25,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:25,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 214 transitions. [2023-11-29 06:22:25,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:25,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:25,567 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:25,567 INFO L175 Difference]: Start difference. First operand has 94 places, 242 transitions, 3255 flow. Second operand 16 states and 214 transitions. [2023-11-29 06:22:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 492 transitions, 7045 flow [2023-11-29 06:22:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 492 transitions, 6926 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-29 06:22:25,670 INFO L231 Difference]: Finished difference. Result has 112 places, 364 transitions, 5581 flow [2023-11-29 06:22:25,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5581, PETRI_PLACES=112, PETRI_TRANSITIONS=364} [2023-11-29 06:22:25,672 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2023-11-29 06:22:25,672 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 364 transitions, 5581 flow [2023-11-29 06:22:25,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:25,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:25,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:25,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:22:25,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:25,876 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 06:22:25,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1283506531, now seen corresponding path program 2 times [2023-11-29 06:22:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:25,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922412439] [2023-11-29 06:22:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:26,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922412439] [2023-11-29 06:22:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922412439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269919971] [2023-11-29 06:22:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:26,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:26,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:22:26,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:26,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:22:26,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:26,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:22:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269919971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:27,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2023-11-29 06:22:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999174851] [2023-11-29 06:22:27,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:22:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:22:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:22:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:27,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 364 transitions, 5581 flow. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:27,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:27,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:30,643 INFO L124 PetriNetUnfolderBase]: 2923/5111 cut-off events. [2023-11-29 06:22:30,643 INFO L125 PetriNetUnfolderBase]: For 44632/44632 co-relation queries the response was YES. [2023-11-29 06:22:30,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31979 conditions, 5111 events. 2923/5111 cut-off events. For 44632/44632 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32190 event pairs, 358 based on Foata normal form. 25/5134 useless extension candidates. Maximal degree in co-relation 31292. Up to 3797 conditions per place. [2023-11-29 06:22:30,700 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 446 selfloop transitions, 168 changer transitions 7/624 dead transitions. [2023-11-29 06:22:30,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 624 transitions, 9927 flow [2023-11-29 06:22:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:22:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 06:22:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 311 transitions. [2023-11-29 06:22:30,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170634920634921 [2023-11-29 06:22:30,702 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 311 transitions. [2023-11-29 06:22:30,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 311 transitions. [2023-11-29 06:22:30,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:30,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 311 transitions. [2023-11-29 06:22:30,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 12.958333333333334) internal successors, (311), 24 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:30,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:30,706 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:30,706 INFO L175 Difference]: Start difference. First operand has 112 places, 364 transitions, 5581 flow. Second operand 24 states and 311 transitions. [2023-11-29 06:22:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 624 transitions, 9927 flow [2023-11-29 06:22:30,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 624 transitions, 9570 flow, removed 165 selfloop flow, removed 5 redundant places. [2023-11-29 06:22:30,926 INFO L231 Difference]: Finished difference. Result has 141 places, 495 transitions, 8243 flow [2023-11-29 06:22:30,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8243, PETRI_PLACES=141, PETRI_TRANSITIONS=495} [2023-11-29 06:22:30,927 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2023-11-29 06:22:30,928 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 495 transitions, 8243 flow [2023-11-29 06:22:30,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:30,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:30,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:30,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:22:31,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:22:31,129 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 06:22:31,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2115052000, now seen corresponding path program 3 times [2023-11-29 06:22:31,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:31,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641189198] [2023-11-29 06:22:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:31,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641189198] [2023-11-29 06:22:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641189198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194797149] [2023-11-29 06:22:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:22:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:31,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:31,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:22:31,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:22:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:31,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:22:31,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:31,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:31,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194797149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:31,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:31,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:22:31,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904601892] [2023-11-29 06:22:31,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:31,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:22:31,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:22:31,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:22:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:31,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 495 transitions, 8243 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 06:22:31,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:31,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:31,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:33,377 INFO L124 PetriNetUnfolderBase]: 4024/7276 cut-off events. [2023-11-29 06:22:33,377 INFO L125 PetriNetUnfolderBase]: For 75790/75790 co-relation queries the response was YES. [2023-11-29 06:22:33,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46464 conditions, 7276 events. 4024/7276 cut-off events. For 75790/75790 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 52342 event pairs, 96 based on Foata normal form. 84/7357 useless extension candidates. Maximal degree in co-relation 44794. Up to 2155 conditions per place. [2023-11-29 06:22:33,435 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 667 selfloop transitions, 246 changer transitions 15/931 dead transitions. [2023-11-29 06:22:33,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 931 transitions, 16240 flow [2023-11-29 06:22:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:22:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:22:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2023-11-29 06:22:33,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2023-11-29 06:22:33,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 148 transitions. [2023-11-29 06:22:33,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 148 transitions. [2023-11-29 06:22:33,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:33,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 148 transitions. [2023-11-29 06:22:33,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,439 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,439 INFO L175 Difference]: Start difference. First operand has 141 places, 495 transitions, 8243 flow. Second operand 12 states and 148 transitions. [2023-11-29 06:22:33,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 931 transitions, 16240 flow [2023-11-29 06:22:33,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 931 transitions, 15387 flow, removed 402 selfloop flow, removed 10 redundant places. [2023-11-29 06:22:33,850 INFO L231 Difference]: Finished difference. Result has 150 places, 629 transitions, 11059 flow [2023-11-29 06:22:33,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11059, PETRI_PLACES=150, PETRI_TRANSITIONS=629} [2023-11-29 06:22:33,851 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2023-11-29 06:22:33,852 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 629 transitions, 11059 flow [2023-11-29 06:22:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 06:22:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:33,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:33,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:22:34,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:34,053 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 06:22:34,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2078169562, now seen corresponding path program 4 times [2023-11-29 06:22:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:34,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653466427] [2023-11-29 06:22:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:34,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653466427] [2023-11-29 06:22:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653466427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094305362] [2023-11-29 06:22:34,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:22:34,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:34,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:34,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:22:34,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:22:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:34,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:22:34,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:34,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:34,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094305362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:34,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:34,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-29 06:22:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463133741] [2023-11-29 06:22:34,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:22:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:22:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:22:34,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:34,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 629 transitions, 11059 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 06:22:34,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:34,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:34,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:36,954 INFO L124 PetriNetUnfolderBase]: 4482/8478 cut-off events. [2023-11-29 06:22:36,954 INFO L125 PetriNetUnfolderBase]: For 107040/107040 co-relation queries the response was YES. [2023-11-29 06:22:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58973 conditions, 8478 events. 4482/8478 cut-off events. For 107040/107040 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 65426 event pairs, 468 based on Foata normal form. 32/8508 useless extension candidates. Maximal degree in co-relation 58264. Up to 3545 conditions per place. [2023-11-29 06:22:37,045 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 526 selfloop transitions, 473 changer transitions 6/1008 dead transitions. [2023-11-29 06:22:37,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 1008 transitions, 19085 flow [2023-11-29 06:22:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:22:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:22:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2023-11-29 06:22:37,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2023-11-29 06:22:37,049 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 163 transitions. [2023-11-29 06:22:37,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 163 transitions. [2023-11-29 06:22:37,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:37,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 163 transitions. [2023-11-29 06:22:37,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:37,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:37,053 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:37,053 INFO L175 Difference]: Start difference. First operand has 150 places, 629 transitions, 11059 flow. Second operand 14 states and 163 transitions. [2023-11-29 06:22:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 1008 transitions, 19085 flow [2023-11-29 06:22:37,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1008 transitions, 18538 flow, removed 265 selfloop flow, removed 3 redundant places. [2023-11-29 06:22:37,735 INFO L231 Difference]: Finished difference. Result has 164 places, 766 transitions, 14731 flow [2023-11-29 06:22:37,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10588, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14731, PETRI_PLACES=164, PETRI_TRANSITIONS=766} [2023-11-29 06:22:37,736 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 142 predicate places. [2023-11-29 06:22:37,736 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 766 transitions, 14731 flow [2023-11-29 06:22:37,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 06:22:37,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:37,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:37,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:22:37,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:37,938 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 06:22:37,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1599296393, now seen corresponding path program 5 times [2023-11-29 06:22:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:37,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949382353] [2023-11-29 06:22:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:37,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:38,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949382353] [2023-11-29 06:22:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949382353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726401958] [2023-11-29 06:22:38,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:22:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:38,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:38,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:22:38,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:22:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:38,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:22:38,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:38,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726401958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:39,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:39,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-29 06:22:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127560941] [2023-11-29 06:22:39,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:22:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:22:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:22:39,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:39,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 766 transitions, 14731 flow. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 06:22:39,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:39,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:39,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:45,579 INFO L124 PetriNetUnfolderBase]: 5394/10031 cut-off events. [2023-11-29 06:22:45,580 INFO L125 PetriNetUnfolderBase]: For 149116/149116 co-relation queries the response was YES. [2023-11-29 06:22:45,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74977 conditions, 10031 events. 5394/10031 cut-off events. For 149116/149116 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 78147 event pairs, 508 based on Foata normal form. 8/10037 useless extension candidates. Maximal degree in co-relation 72694. Up to 3734 conditions per place. [2023-11-29 06:22:45,671 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 369 selfloop transitions, 791 changer transitions 16/1179 dead transitions. [2023-11-29 06:22:45,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1179 transitions, 24289 flow [2023-11-29 06:22:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:22:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:22:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 313 transitions. [2023-11-29 06:22:45,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520282186948854 [2023-11-29 06:22:45,674 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 313 transitions. [2023-11-29 06:22:45,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 313 transitions. [2023-11-29 06:22:45,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:45,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 313 transitions. [2023-11-29 06:22:45,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 11.592592592592593) internal successors, (313), 27 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:45,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:45,678 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:45,678 INFO L175 Difference]: Start difference. First operand has 164 places, 766 transitions, 14731 flow. Second operand 27 states and 313 transitions. [2023-11-29 06:22:45,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 1179 transitions, 24289 flow [2023-11-29 06:22:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1179 transitions, 23807 flow, removed 227 selfloop flow, removed 3 redundant places. [2023-11-29 06:22:46,904 INFO L231 Difference]: Finished difference. Result has 196 places, 1039 transitions, 22711 flow [2023-11-29 06:22:46,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14470, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22711, PETRI_PLACES=196, PETRI_TRANSITIONS=1039} [2023-11-29 06:22:46,906 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 174 predicate places. [2023-11-29 06:22:46,906 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 1039 transitions, 22711 flow [2023-11-29 06:22:46,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 06:22:46,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:46,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:46,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:22:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:22:47,107 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 06:22:47,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1518273780, now seen corresponding path program 6 times [2023-11-29 06:22:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:47,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756909246] [2023-11-29 06:22:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756909246] [2023-11-29 06:22:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756909246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4037494] [2023-11-29 06:22:47,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:22:47,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:47,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:47,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:22:47,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:22:47,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:47,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:22:47,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:47,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:47,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4037494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:47,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:22:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681581810] [2023-11-29 06:22:47,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:47,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:22:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:22:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:22:47,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:47,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 1039 transitions, 22711 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 06:22:47,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:47,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:53,114 INFO L124 PetriNetUnfolderBase]: 6426/11756 cut-off events. [2023-11-29 06:22:53,114 INFO L125 PetriNetUnfolderBase]: For 198051/198051 co-relation queries the response was YES. [2023-11-29 06:22:53,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95452 conditions, 11756 events. 6426/11756 cut-off events. For 198051/198051 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 93089 event pairs, 562 based on Foata normal form. 156/11910 useless extension candidates. Maximal degree in co-relation 94187. Up to 4837 conditions per place. [2023-11-29 06:22:53,296 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 801 selfloop transitions, 775 changer transitions 0/1579 dead transitions. [2023-11-29 06:22:53,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1579 transitions, 36097 flow [2023-11-29 06:22:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:22:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:22:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2023-11-29 06:22:53,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2023-11-29 06:22:53,298 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 166 transitions. [2023-11-29 06:22:53,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 166 transitions. [2023-11-29 06:22:53,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:53,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 166 transitions. [2023-11-29 06:22:53,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.857142857142858) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:53,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:53,300 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:53,300 INFO L175 Difference]: Start difference. First operand has 196 places, 1039 transitions, 22711 flow. Second operand 14 states and 166 transitions. [2023-11-29 06:22:53,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1579 transitions, 36097 flow [2023-11-29 06:22:55,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1579 transitions, 34181 flow, removed 941 selfloop flow, removed 7 redundant places. [2023-11-29 06:22:55,249 INFO L231 Difference]: Finished difference. Result has 210 places, 1273 transitions, 29825 flow [2023-11-29 06:22:55,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21335, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=29825, PETRI_PLACES=210, PETRI_TRANSITIONS=1273} [2023-11-29 06:22:55,251 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 188 predicate places. [2023-11-29 06:22:55,251 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 1273 transitions, 29825 flow [2023-11-29 06:22:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 06:22:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:55,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:22:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:22:55,452 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 06:22:55,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -797408764, now seen corresponding path program 7 times [2023-11-29 06:22:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:55,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648155314] [2023-11-29 06:22:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:55,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648155314] [2023-11-29 06:22:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648155314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282319419] [2023-11-29 06:22:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:22:55,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:55,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:22:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:55,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:22:55,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:55,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282319419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:55,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-11-29 06:22:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936006024] [2023-11-29 06:22:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:22:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:22:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:22:55,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:22:55,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 1273 transitions, 29825 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:55,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:55,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:22:55,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:02,401 INFO L124 PetriNetUnfolderBase]: 6846/12465 cut-off events. [2023-11-29 06:23:02,401 INFO L125 PetriNetUnfolderBase]: For 266249/266249 co-relation queries the response was YES. [2023-11-29 06:23:02,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109716 conditions, 12465 events. 6846/12465 cut-off events. For 266249/266249 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 99539 event pairs, 71 based on Foata normal form. 88/12550 useless extension candidates. Maximal degree in co-relation 108197. Up to 3561 conditions per place. [2023-11-29 06:23:02,517 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1199 selfloop transitions, 604 changer transitions 0/1806 dead transitions. [2023-11-29 06:23:02,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1806 transitions, 41761 flow [2023-11-29 06:23:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:23:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:23:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 171 transitions. [2023-11-29 06:23:02,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 06:23:02,519 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 171 transitions. [2023-11-29 06:23:02,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 171 transitions. [2023-11-29 06:23:02,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:02,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 171 transitions. [2023-11-29 06:23:02,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:02,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:02,520 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:02,521 INFO L175 Difference]: Start difference. First operand has 210 places, 1273 transitions, 29825 flow. Second operand 15 states and 171 transitions. [2023-11-29 06:23:02,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1806 transitions, 41761 flow [2023-11-29 06:23:05,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1806 transitions, 41428 flow, removed 160 selfloop flow, removed 2 redundant places. [2023-11-29 06:23:05,593 INFO L231 Difference]: Finished difference. Result has 226 places, 1364 transitions, 33795 flow [2023-11-29 06:23:05,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=29125, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33795, PETRI_PLACES=226, PETRI_TRANSITIONS=1364} [2023-11-29 06:23:05,595 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 204 predicate places. [2023-11-29 06:23:05,595 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 1364 transitions, 33795 flow [2023-11-29 06:23:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:23:05,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:23:05,796 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 06:23:05,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,796 INFO L85 PathProgramCache]: Analyzing trace with hash -518811797, now seen corresponding path program 8 times [2023-11-29 06:23:05,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266989398] [2023-11-29 06:23:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:06,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:06,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266989398] [2023-11-29 06:23:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266989398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:06,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071377438] [2023-11-29 06:23:06,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:06,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:06,131 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:06,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:23:06,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:23:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:06,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:23:06,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:06,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071377438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:06,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-29 06:23:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230210004] [2023-11-29 06:23:06,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:23:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:23:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:23:06,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:23:06,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 1364 transitions, 33795 flow. Second operand has 18 states, 18 states have (on average 7.388888888888889) internal successors, (133), 18 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 06:23:06,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:06,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:23:06,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:17,736 INFO L124 PetriNetUnfolderBase]: 7850/14231 cut-off events. [2023-11-29 06:23:17,736 INFO L125 PetriNetUnfolderBase]: For 354646/354646 co-relation queries the response was YES. [2023-11-29 06:23:17,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132968 conditions, 14231 events. 7850/14231 cut-off events. For 354646/354646 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 115567 event pairs, 650 based on Foata normal form. 15/14244 useless extension candidates. Maximal degree in co-relation 131359. Up to 6820 conditions per place. [2023-11-29 06:23:17,957 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 608 selfloop transitions, 1189 changer transitions 24/1824 dead transitions. [2023-11-29 06:23:17,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1824 transitions, 48245 flow [2023-11-29 06:23:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:23:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:23:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 295 transitions. [2023-11-29 06:23:17,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2023-11-29 06:23:17,959 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 295 transitions. [2023-11-29 06:23:17,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 295 transitions. [2023-11-29 06:23:17,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:17,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 295 transitions. [2023-11-29 06:23:17,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.8) internal successors, (295), 25 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:17,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:17,962 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:17,962 INFO L175 Difference]: Start difference. First operand has 226 places, 1364 transitions, 33795 flow. Second operand 25 states and 295 transitions. [2023-11-29 06:23:17,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1824 transitions, 48245 flow [2023-11-29 06:23:23,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1824 transitions, 47368 flow, removed 169 selfloop flow, removed 5 redundant places. [2023-11-29 06:23:23,237 INFO L231 Difference]: Finished difference. Result has 255 places, 1679 transitions, 46689 flow [2023-11-29 06:23:23,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=33308, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=46689, PETRI_PLACES=255, PETRI_TRANSITIONS=1679} [2023-11-29 06:23:23,238 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 233 predicate places. [2023-11-29 06:23:23,239 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 1679 transitions, 46689 flow [2023-11-29 06:23:23,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.388888888888889) internal successors, (133), 18 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 06:23:23,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:23,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:23,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:23:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:23:23,440 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 06:23:23,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -276828181, now seen corresponding path program 9 times [2023-11-29 06:23:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714654445] [2023-11-29 06:23:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:23,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:23,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714654445] [2023-11-29 06:23:23,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714654445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:23,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522157816] [2023-11-29 06:23:23,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:23:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:23,781 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:23,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:23:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:23:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:23,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:23:23,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:24,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:25,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522157816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:25,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:25,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-29 06:23:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983304513] [2023-11-29 06:23:25,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:25,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:23:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:23:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:23:25,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:23:25,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 1679 transitions, 46689 flow. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 06:23:25,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:25,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:23:25,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:43,159 INFO L124 PetriNetUnfolderBase]: 11001/19970 cut-off events. [2023-11-29 06:23:43,159 INFO L125 PetriNetUnfolderBase]: For 581994/581994 co-relation queries the response was YES. [2023-11-29 06:23:43,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200563 conditions, 19970 events. 11001/19970 cut-off events. For 581994/581994 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 171585 event pairs, 985 based on Foata normal form. 43/20010 useless extension candidates. Maximal degree in co-relation 198888. Up to 7420 conditions per place. [2023-11-29 06:23:43,454 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 776 selfloop transitions, 1908 changer transitions 33/2720 dead transitions. [2023-11-29 06:23:43,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 2720 transitions, 81458 flow [2023-11-29 06:23:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:23:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 06:23:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 377 transitions. [2023-11-29 06:23:43,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610119047619048 [2023-11-29 06:23:43,457 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 377 transitions. [2023-11-29 06:23:43,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 377 transitions. [2023-11-29 06:23:43,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:43,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 377 transitions. [2023-11-29 06:23:43,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.78125) internal successors, (377), 32 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,460 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,460 INFO L175 Difference]: Start difference. First operand has 255 places, 1679 transitions, 46689 flow. Second operand 32 states and 377 transitions. [2023-11-29 06:23:43,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 2720 transitions, 81458 flow [2023-11-29 06:23:53,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 2720 transitions, 77703 flow, removed 1794 selfloop flow, removed 5 redundant places. [2023-11-29 06:23:53,315 INFO L231 Difference]: Finished difference. Result has 292 places, 2482 transitions, 74415 flow [2023-11-29 06:23:53,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44521, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=74415, PETRI_PLACES=292, PETRI_TRANSITIONS=2482} [2023-11-29 06:23:53,317 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 270 predicate places. [2023-11-29 06:23:53,317 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 2482 transitions, 74415 flow [2023-11-29 06:23:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 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 06:23:53,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:53,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:53,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:23:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:23:53,518 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 06:23:53,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -703154906, now seen corresponding path program 10 times [2023-11-29 06:23:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010175058] [2023-11-29 06:23:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:53,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:53,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010175058] [2023-11-29 06:23:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010175058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:53,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601263027] [2023-11-29 06:23:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:23:53,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:53,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:53,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:23:53,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:23:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:53,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:23:53,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:53,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:53,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601263027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:53,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:23:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6952898] [2023-11-29 06:23:53,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:53,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:23:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:23:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:23:53,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:23:53,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 2482 transitions, 74415 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 06:23:53,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:53,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:23:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:14,863 INFO L124 PetriNetUnfolderBase]: 11234/20046 cut-off events. [2023-11-29 06:24:14,864 INFO L125 PetriNetUnfolderBase]: For 636659/636659 co-relation queries the response was YES. [2023-11-29 06:24:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209696 conditions, 20046 events. 11234/20046 cut-off events. For 636659/636659 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 168534 event pairs, 1054 based on Foata normal form. 1110/21154 useless extension candidates. Maximal degree in co-relation 207315. Up to 16290 conditions per place. [2023-11-29 06:24:15,234 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2404 selfloop transitions, 475 changer transitions 0/2882 dead transitions. [2023-11-29 06:24:15,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 2882 transitions, 88894 flow [2023-11-29 06:24:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:24:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:24:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2023-11-29 06:24:15,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2023-11-29 06:24:15,236 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 167 transitions. [2023-11-29 06:24:15,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 167 transitions. [2023-11-29 06:24:15,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:15,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 167 transitions. [2023-11-29 06:24:15,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:15,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:15,238 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:15,238 INFO L175 Difference]: Start difference. First operand has 292 places, 2482 transitions, 74415 flow. Second operand 13 states and 167 transitions. [2023-11-29 06:24:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 2882 transitions, 88894 flow [2023-11-29 06:24:26,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 2882 transitions, 83958 flow, removed 2176 selfloop flow, removed 4 redundant places. [2023-11-29 06:24:26,659 INFO L231 Difference]: Finished difference. Result has 307 places, 2686 transitions, 76500 flow [2023-11-29 06:24:26,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=67151, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2066, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=76500, PETRI_PLACES=307, PETRI_TRANSITIONS=2686} [2023-11-29 06:24:26,662 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 285 predicate places. [2023-11-29 06:24:26,662 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 2686 transitions, 76500 flow [2023-11-29 06:24:26,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 06:24:26,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:26,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:26,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:24:26,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:24:26,863 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 06:24:26,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1842676733, now seen corresponding path program 11 times [2023-11-29 06:24:26,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:26,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454793204] [2023-11-29 06:24:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:26,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:24:26,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454793204] [2023-11-29 06:24:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454793204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098638901] [2023-11-29 06:24:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:24:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:26,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:24:26,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:24:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:26,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:24:26,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:24:27,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:24:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098638901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:27,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:27,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 06:24:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310280395] [2023-11-29 06:24:27,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:27,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:24:27,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:24:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:24:27,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:24:27,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 2686 transitions, 76500 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:27,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:24:27,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:24:27,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:44,149 INFO L124 PetriNetUnfolderBase]: 8237/14925 cut-off events. [2023-11-29 06:24:44,150 INFO L125 PetriNetUnfolderBase]: For 538286/538286 co-relation queries the response was YES. [2023-11-29 06:24:44,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151654 conditions, 14925 events. 8237/14925 cut-off events. For 538286/538286 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 123889 event pairs, 608 based on Foata normal form. 922/15845 useless extension candidates. Maximal degree in co-relation 151310. Up to 9582 conditions per place. [2023-11-29 06:24:44,400 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 1580 selfloop transitions, 485 changer transitions 2/2070 dead transitions. [2023-11-29 06:24:44,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 2070 transitions, 62304 flow [2023-11-29 06:24:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:24:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:24:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 06:24:44,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2023-11-29 06:24:44,401 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 06:24:44,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 06:24:44,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:44,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 06:24:44,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:44,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:44,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:44,402 INFO L175 Difference]: Start difference. First operand has 307 places, 2686 transitions, 76500 flow. Second operand 5 states and 66 transitions. [2023-11-29 06:24:44,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 2070 transitions, 62304 flow [2023-11-29 06:24:51,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 2070 transitions, 60390 flow, removed 678 selfloop flow, removed 13 redundant places. [2023-11-29 06:24:51,658 INFO L231 Difference]: Finished difference. Result has 297 places, 1891 transitions, 53895 flow [2023-11-29 06:24:51,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48648, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=53895, PETRI_PLACES=297, PETRI_TRANSITIONS=1891} [2023-11-29 06:24:51,659 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 275 predicate places. [2023-11-29 06:24:51,659 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1891 transitions, 53895 flow [2023-11-29 06:24:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:51,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:51,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:24:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:51,860 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 06:24:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash -600560948, now seen corresponding path program 12 times [2023-11-29 06:24:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634411523] [2023-11-29 06:24:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:51,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:24:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634411523] [2023-11-29 06:24:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634411523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441346623] [2023-11-29 06:24:51,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:24:51,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:51,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:24:52,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:24:52,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:52,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:24:52,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:24:52,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:24:52,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441346623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:52,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-29 06:24:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529847653] [2023-11-29 06:24:52,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:24:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:24:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:24:52,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:24:52,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 1891 transitions, 53895 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 06:24:52,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:24:52,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:24:52,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:25:04,157 INFO L124 PetriNetUnfolderBase]: 8215/14856 cut-off events. [2023-11-29 06:25:04,157 INFO L125 PetriNetUnfolderBase]: For 491257/491257 co-relation queries the response was YES. [2023-11-29 06:25:04,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153131 conditions, 14856 events. 8215/14856 cut-off events. For 491257/491257 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 123324 event pairs, 379 based on Foata normal form. 12/14865 useless extension candidates. Maximal degree in co-relation 150616. Up to 9975 conditions per place. [2023-11-29 06:25:04,394 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1806 selfloop transitions, 177 changer transitions 8/1994 dead transitions. [2023-11-29 06:25:04,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1994 transitions, 59408 flow [2023-11-29 06:25:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:25:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:25:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 166 transitions. [2023-11-29 06:25:04,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526984126984127 [2023-11-29 06:25:04,395 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 166 transitions. [2023-11-29 06:25:04,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 166 transitions. [2023-11-29 06:25:04,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:25:04,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 166 transitions. [2023-11-29 06:25:04,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.066666666666666) internal successors, (166), 15 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:04,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:04,396 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:04,396 INFO L175 Difference]: Start difference. First operand has 297 places, 1891 transitions, 53895 flow. Second operand 15 states and 166 transitions. [2023-11-29 06:25:04,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1994 transitions, 59408 flow [2023-11-29 06:25:11,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1994 transitions, 59100 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-11-29 06:25:11,179 INFO L231 Difference]: Finished difference. Result has 313 places, 1895 transitions, 53949 flow [2023-11-29 06:25:11,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=53057, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=53949, PETRI_PLACES=313, PETRI_TRANSITIONS=1895} [2023-11-29 06:25:11,181 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 291 predicate places. [2023-11-29 06:25:11,181 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 1895 transitions, 53949 flow [2023-11-29 06:25:11,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 06:25:11,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:25:11,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:25:11,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:25:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:11,382 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 06:25:11,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:11,382 INFO L85 PathProgramCache]: Analyzing trace with hash -623002834, now seen corresponding path program 13 times [2023-11-29 06:25:11,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097039299] [2023-11-29 06:25:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097039299] [2023-11-29 06:25:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097039299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:25:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430278650] [2023-11-29 06:25:11,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:25:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:25:11,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:25:11,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:25:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:11,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:25:11,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:25:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:11,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:25:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430278650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:25:11,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:25:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 06:25:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539097447] [2023-11-29 06:25:11,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:25:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:25:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:25:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:25:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:25:11,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1895 transitions, 53949 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:25:11,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:25:11,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:25:26,759 INFO L124 PetriNetUnfolderBase]: 9639/17571 cut-off events. [2023-11-29 06:25:26,759 INFO L125 PetriNetUnfolderBase]: For 639798/639798 co-relation queries the response was YES. [2023-11-29 06:25:26,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181894 conditions, 17571 events. 9639/17571 cut-off events. For 639798/639798 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 149700 event pairs, 345 based on Foata normal form. 332/17900 useless extension candidates. Maximal degree in co-relation 181016. Up to 6555 conditions per place. [2023-11-29 06:25:27,027 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1674 selfloop transitions, 652 changer transitions 126/2455 dead transitions. [2023-11-29 06:25:27,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 2455 transitions, 68902 flow [2023-11-29 06:25:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:25:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:25:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2023-11-29 06:25:27,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-29 06:25:27,029 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 141 transitions. [2023-11-29 06:25:27,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 141 transitions. [2023-11-29 06:25:27,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:25:27,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 141 transitions. [2023-11-29 06:25:27,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:27,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:27,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:27,031 INFO L175 Difference]: Start difference. First operand has 313 places, 1895 transitions, 53949 flow. Second operand 12 states and 141 transitions. [2023-11-29 06:25:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 2455 transitions, 68902 flow [2023-11-29 06:25:35,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 2455 transitions, 68366 flow, removed 239 selfloop flow, removed 5 redundant places. [2023-11-29 06:25:35,759 INFO L231 Difference]: Finished difference. Result has 324 places, 1883 transitions, 54246 flow [2023-11-29 06:25:35,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48020, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=54246, PETRI_PLACES=324, PETRI_TRANSITIONS=1883} [2023-11-29 06:25:35,761 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 302 predicate places. [2023-11-29 06:25:35,761 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 1883 transitions, 54246 flow [2023-11-29 06:25:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:35,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:25:35,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:25:35,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:25:35,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:25:35,962 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 06:25:35,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash 123789580, now seen corresponding path program 14 times [2023-11-29 06:25:35,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:35,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585011808] [2023-11-29 06:25:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:36,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585011808] [2023-11-29 06:25:36,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585011808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:25:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746386418] [2023-11-29 06:25:36,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:25:36,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:25:36,023 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:25:36,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:25:36,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:25:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:25:36,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:25:36,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:25:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:25:36,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:25:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:36,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746386418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:25:36,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:25:36,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-29 06:25:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710734184] [2023-11-29 06:25:36,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:25:36,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:25:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:25:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:25:36,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:25:36,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 1883 transitions, 54246 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:36,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:25:36,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:25:36,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:25:50,790 INFO L124 PetriNetUnfolderBase]: 9076/16415 cut-off events. [2023-11-29 06:25:50,790 INFO L125 PetriNetUnfolderBase]: For 701776/701776 co-relation queries the response was YES. [2023-11-29 06:25:50,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179354 conditions, 16415 events. 9076/16415 cut-off events. For 701776/701776 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 136398 event pairs, 630 based on Foata normal form. 646/17059 useless extension candidates. Maximal degree in co-relation 177340. Up to 9232 conditions per place. [2023-11-29 06:25:51,084 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 1469 selfloop transitions, 782 changer transitions 0/2254 dead transitions. [2023-11-29 06:25:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 2254 transitions, 67191 flow [2023-11-29 06:25:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:25:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:25:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2023-11-29 06:25:51,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017316017316018 [2023-11-29 06:25:51,086 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 139 transitions. [2023-11-29 06:25:51,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 139 transitions. [2023-11-29 06:25:51,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:25:51,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 139 transitions. [2023-11-29 06:25:51,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:51,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:51,088 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:51,088 INFO L175 Difference]: Start difference. First operand has 324 places, 1883 transitions, 54246 flow. Second operand 11 states and 139 transitions. [2023-11-29 06:25:51,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 2254 transitions, 67191 flow [2023-11-29 06:26:01,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 2254 transitions, 64524 flow, removed 1048 selfloop flow, removed 8 redundant places. [2023-11-29 06:26:01,397 INFO L231 Difference]: Finished difference. Result has 330 places, 1979 transitions, 57348 flow [2023-11-29 06:26:01,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=51298, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=57348, PETRI_PLACES=330, PETRI_TRANSITIONS=1979} [2023-11-29 06:26:01,399 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 308 predicate places. [2023-11-29 06:26:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 1979 transitions, 57348 flow [2023-11-29 06:26:01,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:26:01,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:01,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:26:01,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:26:01,600 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 06:26:01,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1018154959, now seen corresponding path program 15 times [2023-11-29 06:26:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:01,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017791865] [2023-11-29 06:26:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:26:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017791865] [2023-11-29 06:26:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017791865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:01,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:01,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:26:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850370006] [2023-11-29 06:26:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:26:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:26:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:01,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:26:01,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1979 transitions, 57348 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:26:01,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:26:01,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:26:11,799 INFO L124 PetriNetUnfolderBase]: 5745/10725 cut-off events. [2023-11-29 06:26:11,799 INFO L125 PetriNetUnfolderBase]: For 388049/388049 co-relation queries the response was YES. [2023-11-29 06:26:11,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115852 conditions, 10725 events. 5745/10725 cut-off events. For 388049/388049 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 86721 event pairs, 1384 based on Foata normal form. 458/11180 useless extension candidates. Maximal degree in co-relation 114600. Up to 5919 conditions per place. [2023-11-29 06:26:11,947 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 1043 selfloop transitions, 249 changer transitions 311/1606 dead transitions. [2023-11-29 06:26:11,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1606 transitions, 49990 flow [2023-11-29 06:26:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:26:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:26:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2023-11-29 06:26:11,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2023-11-29 06:26:11,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 53 transitions. [2023-11-29 06:26:11,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 53 transitions. [2023-11-29 06:26:11,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:11,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 53 transitions. [2023-11-29 06:26:11,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:11,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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 06:26:11,949 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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 06:26:11,949 INFO L175 Difference]: Start difference. First operand has 330 places, 1979 transitions, 57348 flow. Second operand 4 states and 53 transitions. [2023-11-29 06:26:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1606 transitions, 49990 flow [2023-11-29 06:26:16,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1606 transitions, 48715 flow, removed 545 selfloop flow, removed 12 redundant places. [2023-11-29 06:26:16,577 INFO L231 Difference]: Finished difference. Result has 319 places, 1200 transitions, 33759 flow [2023-11-29 06:26:16,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40432, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=33759, PETRI_PLACES=319, PETRI_TRANSITIONS=1200} [2023-11-29 06:26:16,578 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 297 predicate places. [2023-11-29 06:26:16,578 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1200 transitions, 33759 flow [2023-11-29 06:26:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:16,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:26:16,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:16,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 06:26:16,579 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 06:26:16,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash 877193618, now seen corresponding path program 4 times [2023-11-29 06:26:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706179516] [2023-11-29 06:26:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:16,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706179516] [2023-11-29 06:26:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706179516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760434386] [2023-11-29 06:26:16,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:26:16,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:16,645 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:16,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:26:16,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:26:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:16,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:26:16,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:16,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760434386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:16,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-11-29 06:26:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067494666] [2023-11-29 06:26:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:26:16,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:26:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:26:16,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:26:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1200 transitions, 33759 flow. Second operand has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:26:16,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:26:16,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:26:24,114 INFO L124 PetriNetUnfolderBase]: 6333/11746 cut-off events. [2023-11-29 06:26:24,114 INFO L125 PetriNetUnfolderBase]: For 463544/463544 co-relation queries the response was YES. [2023-11-29 06:26:24,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128950 conditions, 11746 events. 6333/11746 cut-off events. For 463544/463544 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93215 event pairs, 608 based on Foata normal form. 156/11900 useless extension candidates. Maximal degree in co-relation 126790. Up to 3213 conditions per place. [2023-11-29 06:26:24,288 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 851 selfloop transitions, 975 changer transitions 0/1829 dead transitions. [2023-11-29 06:26:24,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1829 transitions, 53992 flow [2023-11-29 06:26:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:26:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:26:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 276 transitions. [2023-11-29 06:26:24,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:26:24,290 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 276 transitions. [2023-11-29 06:26:24,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 276 transitions. [2023-11-29 06:26:24,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:24,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 276 transitions. [2023-11-29 06:26:24,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.0) internal successors, (276), 23 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:24,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:24,291 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:24,292 INFO L175 Difference]: Start difference. First operand has 319 places, 1200 transitions, 33759 flow. Second operand 23 states and 276 transitions. [2023-11-29 06:26:24,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1829 transitions, 53992 flow [2023-11-29 06:26:28,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1829 transitions, 52992 flow, removed 299 selfloop flow, removed 3 redundant places. [2023-11-29 06:26:28,993 INFO L231 Difference]: Finished difference. Result has 346 places, 1533 transitions, 47631 flow [2023-11-29 06:26:28,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=33076, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=47631, PETRI_PLACES=346, PETRI_TRANSITIONS=1533} [2023-11-29 06:26:28,995 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 324 predicate places. [2023-11-29 06:26:28,995 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1533 transitions, 47631 flow [2023-11-29 06:26:28,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:28,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:26:28,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:28,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:26:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:26:29,196 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 06:26:29,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1947915088, now seen corresponding path program 5 times [2023-11-29 06:26:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205739166] [2023-11-29 06:26:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205739166] [2023-11-29 06:26:29,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205739166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209524698] [2023-11-29 06:26:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:26:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:29,282 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:29,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:26:29,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:26:29,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:29,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:26:29,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:29,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:26:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209524698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:29,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-11-29 06:26:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232057128] [2023-11-29 06:26:29,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:29,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:26:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:26:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:26:29,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:26:29,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1533 transitions, 47631 flow. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 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 06:26:29,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:26:29,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:26:29,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:26:38,635 INFO L124 PetriNetUnfolderBase]: 6108/11362 cut-off events. [2023-11-29 06:26:38,635 INFO L125 PetriNetUnfolderBase]: For 508402/508402 co-relation queries the response was YES. [2023-11-29 06:26:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130430 conditions, 11362 events. 6108/11362 cut-off events. For 508402/508402 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 90470 event pairs, 149 based on Foata normal form. 116/11475 useless extension candidates. Maximal degree in co-relation 128217. Up to 2783 conditions per place. [2023-11-29 06:26:38,808 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1166 selfloop transitions, 758 changer transitions 0/1927 dead transitions. [2023-11-29 06:26:38,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1927 transitions, 58485 flow [2023-11-29 06:26:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:26:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:26:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 279 transitions. [2023-11-29 06:26:38,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2023-11-29 06:26:38,809 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 279 transitions. [2023-11-29 06:26:38,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 279 transitions. [2023-11-29 06:26:38,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:38,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 279 transitions. [2023-11-29 06:26:38,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.16) internal successors, (279), 25 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:38,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:38,811 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:38,811 INFO L175 Difference]: Start difference. First operand has 346 places, 1533 transitions, 47631 flow. Second operand 25 states and 279 transitions. [2023-11-29 06:26:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1927 transitions, 58485 flow [2023-11-29 06:26:44,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1927 transitions, 57575 flow, removed 409 selfloop flow, removed 4 redundant places. [2023-11-29 06:26:44,362 INFO L231 Difference]: Finished difference. Result has 370 places, 1539 transitions, 49200 flow [2023-11-29 06:26:44,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=45873, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=49200, PETRI_PLACES=370, PETRI_TRANSITIONS=1539} [2023-11-29 06:26:44,364 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 348 predicate places. [2023-11-29 06:26:44,364 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1539 transitions, 49200 flow [2023-11-29 06:26:44,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 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 06:26:44,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:26:44,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:44,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:44,565 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 06:26:44,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1277490079, now seen corresponding path program 16 times [2023-11-29 06:26:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63944141] [2023-11-29 06:26:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:44,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63944141] [2023-11-29 06:26:44,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63944141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134024553] [2023-11-29 06:26:44,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:26:44,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:44,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:44,941 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:44,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:26:45,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:26:45,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:26:45,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:26:45,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:45,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134024553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:46,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-29 06:26:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299351927] [2023-11-29 06:26:46,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:26:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:26:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:26:46,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:26:46,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1539 transitions, 49200 flow. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:46,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:26:46,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:26:46,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:26:58,276 INFO L124 PetriNetUnfolderBase]: 6820/12758 cut-off events. [2023-11-29 06:26:58,276 INFO L125 PetriNetUnfolderBase]: For 617876/617876 co-relation queries the response was YES. [2023-11-29 06:26:58,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152590 conditions, 12758 events. 6820/12758 cut-off events. For 617876/617876 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 104372 event pairs, 540 based on Foata normal form. 18/12774 useless extension candidates. Maximal degree in co-relation 149489. Up to 11423 conditions per place. [2023-11-29 06:26:58,484 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1664 selfloop transitions, 163 changer transitions 19/1849 dead transitions. [2023-11-29 06:26:58,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1849 transitions, 61726 flow [2023-11-29 06:26:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:26:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:26:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 221 transitions. [2023-11-29 06:26:58,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2023-11-29 06:26:58,487 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 221 transitions. [2023-11-29 06:26:58,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 221 transitions. [2023-11-29 06:26:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:58,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 221 transitions. [2023-11-29 06:26:58,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,488 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:58,488 INFO L175 Difference]: Start difference. First operand has 370 places, 1539 transitions, 49200 flow. Second operand 18 states and 221 transitions. [2023-11-29 06:26:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1849 transitions, 61726 flow [2023-11-29 06:27:07,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1849 transitions, 60238 flow, removed 538 selfloop flow, removed 8 redundant places. [2023-11-29 06:27:07,919 INFO L231 Difference]: Finished difference. Result has 388 places, 1676 transitions, 52996 flow [2023-11-29 06:27:07,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=47791, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=52996, PETRI_PLACES=388, PETRI_TRANSITIONS=1676} [2023-11-29 06:27:07,921 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 366 predicate places. [2023-11-29 06:27:07,921 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1676 transitions, 52996 flow [2023-11-29 06:27:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:27:07,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:27:07,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:07,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:27:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:08,122 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 06:27:08,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 84033675, now seen corresponding path program 17 times [2023-11-29 06:27:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:08,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214880860] [2023-11-29 06:27:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214880860] [2023-11-29 06:27:08,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214880860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:27:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248187245] [2023-11-29 06:27:08,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:27:08,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:08,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:08,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:27:08,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:27:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:27:08,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:27:08,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:09,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:13,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248187245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:13,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:27:13,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 06:27:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901120013] [2023-11-29 06:27:13,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:27:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:27:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=383, Unknown=1, NotChecked=0, Total=462 [2023-11-29 06:27:13,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:27:13,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1676 transitions, 52996 flow. Second operand has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:27:13,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:27:13,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:27:13,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:27:23,707 WARN L293 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 39 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:27:26,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:27:29,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:27:34,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:28:04,739 WARN L293 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:28:08,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:28:14,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:28:33,835 INFO L124 PetriNetUnfolderBase]: 7723/14503 cut-off events. [2023-11-29 06:28:33,835 INFO L125 PetriNetUnfolderBase]: For 682289/682289 co-relation queries the response was YES. [2023-11-29 06:28:34,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171540 conditions, 14503 events. 7723/14503 cut-off events. For 682289/682289 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 121123 event pairs, 510 based on Foata normal form. 22/14523 useless extension candidates. Maximal degree in co-relation 167683. Up to 8892 conditions per place. [2023-11-29 06:28:34,098 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 946 selfloop transitions, 1123 changer transitions 34/2106 dead transitions. [2023-11-29 06:28:34,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2106 transitions, 69636 flow [2023-11-29 06:28:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:28:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:28:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 341 transitions. [2023-11-29 06:28:34,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599343185550082 [2023-11-29 06:28:34,100 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 341 transitions. [2023-11-29 06:28:34,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 341 transitions. [2023-11-29 06:28:34,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:28:34,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 341 transitions. [2023-11-29 06:28:34,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 11.758620689655173) internal successors, (341), 29 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:28:34,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:28:34,102 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:28:34,103 INFO L175 Difference]: Start difference. First operand has 388 places, 1676 transitions, 52996 flow. Second operand 29 states and 341 transitions. [2023-11-29 06:28:34,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2106 transitions, 69636 flow [2023-11-29 06:28:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2106 transitions, 68754 flow, removed 433 selfloop flow, removed 5 redundant places. [2023-11-29 06:28:43,044 INFO L231 Difference]: Finished difference. Result has 425 places, 1913 transitions, 65046 flow [2023-11-29 06:28:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52114, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=919, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=65046, PETRI_PLACES=425, PETRI_TRANSITIONS=1913} [2023-11-29 06:28:43,046 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 403 predicate places. [2023-11-29 06:28:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1913 transitions, 65046 flow [2023-11-29 06:28:43,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:28:43,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:28:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:28:43,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:28:43,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:28:43,247 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 06:28:43,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:28:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 69889741, now seen corresponding path program 18 times [2023-11-29 06:28:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:28:43,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985163227] [2023-11-29 06:28:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:28:43,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:28:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:28:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:28:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:28:43,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985163227] [2023-11-29 06:28:43,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985163227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:28:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305276029] [2023-11-29 06:28:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:28:43,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:28:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:28:43,852 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:28:43,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:28:44,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:28:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:28:44,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:28:44,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:28:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:28:44,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:28:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:28:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305276029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:28:45,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:28:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 24 [2023-11-29 06:28:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125650703] [2023-11-29 06:28:45,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:28:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:28:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:28:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:28:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:28:45,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:28:45,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1913 transitions, 65046 flow. Second operand has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:28:45,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:28:45,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:28:45,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:29:07,688 INFO L124 PetriNetUnfolderBase]: 8537/15866 cut-off events. [2023-11-29 06:29:07,688 INFO L125 PetriNetUnfolderBase]: For 809390/809390 co-relation queries the response was YES. [2023-11-29 06:29:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197973 conditions, 15866 events. 8537/15866 cut-off events. For 809390/809390 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 132861 event pairs, 544 based on Foata normal form. 7/15871 useless extension candidates. Maximal degree in co-relation 193230. Up to 9664 conditions per place. [2023-11-29 06:29:07,998 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 987 selfloop transitions, 1284 changer transitions 52/2326 dead transitions. [2023-11-29 06:29:07,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 2326 transitions, 80669 flow [2023-11-29 06:29:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:29:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 06:29:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 400 transitions. [2023-11-29 06:29:08,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2023-11-29 06:29:08,001 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 400 transitions. [2023-11-29 06:29:08,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 400 transitions. [2023-11-29 06:29:08,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:29:08,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 400 transitions. [2023-11-29 06:29:08,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 11.11111111111111) internal successors, (400), 36 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:08,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 21.0) internal successors, (777), 37 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:08,005 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 21.0) internal successors, (777), 37 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:08,005 INFO L175 Difference]: Start difference. First operand has 425 places, 1913 transitions, 65046 flow. Second operand 36 states and 400 transitions. [2023-11-29 06:29:08,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 2326 transitions, 80669 flow [2023-11-29 06:29:19,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2326 transitions, 78370 flow, removed 1136 selfloop flow, removed 7 redundant places. [2023-11-29 06:29:19,663 INFO L231 Difference]: Finished difference. Result has 463 places, 2148 transitions, 76531 flow [2023-11-29 06:29:19,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=62747, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=76531, PETRI_PLACES=463, PETRI_TRANSITIONS=2148} [2023-11-29 06:29:19,665 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 441 predicate places. [2023-11-29 06:29:19,666 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2148 transitions, 76531 flow [2023-11-29 06:29:19,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:19,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:29:19,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:29:19,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 06:29:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:29:19,866 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 06:29:19,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:29:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1433532165, now seen corresponding path program 19 times [2023-11-29 06:29:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:29:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404984258] [2023-11-29 06:29:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:29:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:29:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:29:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:20,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:29:20,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404984258] [2023-11-29 06:29:20,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404984258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:29:20,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662863656] [2023-11-29 06:29:20,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:29:20,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:29:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:29:20,220 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:29:20,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:29:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:29:21,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:29:21,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:29:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:21,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:29:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:22,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662863656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:29:22,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:29:22,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 06:29:22,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572806659] [2023-11-29 06:29:22,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:29:22,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:29:22,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:29:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:29:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:29:22,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:29:22,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2148 transitions, 76531 flow. Second operand has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:22,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:29:22,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:29:22,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:29:44,069 INFO L124 PetriNetUnfolderBase]: 9197/17182 cut-off events. [2023-11-29 06:29:44,069 INFO L125 PetriNetUnfolderBase]: For 946523/946523 co-relation queries the response was YES. [2023-11-29 06:29:44,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219380 conditions, 17182 events. 9197/17182 cut-off events. For 946523/946523 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 146479 event pairs, 606 based on Foata normal form. 9/17189 useless extension candidates. Maximal degree in co-relation 215923. Up to 10690 conditions per place. [2023-11-29 06:29:44,459 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1139 selfloop transitions, 1341 changer transitions 18/2501 dead transitions. [2023-11-29 06:29:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2501 transitions, 92029 flow [2023-11-29 06:29:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:29:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:29:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 301 transitions. [2023-11-29 06:29:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2023-11-29 06:29:44,461 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 301 transitions. [2023-11-29 06:29:44,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 301 transitions. [2023-11-29 06:29:44,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:29:44,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 301 transitions. [2023-11-29 06:29:44,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 12.04) internal successors, (301), 25 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:44,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:44,463 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:44,463 INFO L175 Difference]: Start difference. First operand has 463 places, 2148 transitions, 76531 flow. Second operand 25 states and 301 transitions. [2023-11-29 06:29:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2501 transitions, 92029 flow [2023-11-29 06:29:57,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2501 transitions, 90606 flow, removed 699 selfloop flow, removed 8 redundant places. [2023-11-29 06:29:57,813 INFO L231 Difference]: Finished difference. Result has 490 places, 2329 transitions, 86434 flow [2023-11-29 06:29:57,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=75118, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=86434, PETRI_PLACES=490, PETRI_TRANSITIONS=2329} [2023-11-29 06:29:57,816 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 468 predicate places. [2023-11-29 06:29:57,816 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 2329 transitions, 86434 flow [2023-11-29 06:29:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2727272727272725) internal successors, (160), 22 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:57,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:29:57,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:29:57,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:29:58,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:29:58,017 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 06:29:58,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:29:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1851309891, now seen corresponding path program 20 times [2023-11-29 06:29:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:29:58,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262586828] [2023-11-29 06:29:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:29:58,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:29:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:29:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:29:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262586828] [2023-11-29 06:29:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262586828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:29:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856048854] [2023-11-29 06:29:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:29:58,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:29:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:29:58,491 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:29:58,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:29:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:29:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:29:58,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:29:58,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:29:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:59,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:29:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:29:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856048854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:29:59,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:29:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-29 06:29:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587837661] [2023-11-29 06:29:59,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:29:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:29:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:29:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:29:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:29:59,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:29:59,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 2329 transitions, 86434 flow. Second operand has 28 states, 28 states have (on average 6.857142857142857) internal successors, (192), 28 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:59,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:29:59,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:29:59,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:30:47,689 INFO L124 PetriNetUnfolderBase]: 10870/19920 cut-off events. [2023-11-29 06:30:47,689 INFO L125 PetriNetUnfolderBase]: For 1182439/1182439 co-relation queries the response was YES. [2023-11-29 06:30:48,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264298 conditions, 19920 events. 10870/19920 cut-off events. For 1182439/1182439 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 169853 event pairs, 622 based on Foata normal form. 10/19928 useless extension candidates. Maximal degree in co-relation 260693. Up to 7938 conditions per place. [2023-11-29 06:30:48,174 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1119 selfloop transitions, 1929 changer transitions 81/3132 dead transitions. [2023-11-29 06:30:48,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 3132 transitions, 118714 flow [2023-11-29 06:30:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 06:30:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-29 06:30:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 657 transitions. [2023-11-29 06:30:48,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046082949308756 [2023-11-29 06:30:48,177 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 657 transitions. [2023-11-29 06:30:48,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 657 transitions. [2023-11-29 06:30:48,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:30:48,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 657 transitions. [2023-11-29 06:30:48,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 10.596774193548388) internal successors, (657), 62 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:48,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 21.0) internal successors, (1323), 63 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:48,182 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 21.0) internal successors, (1323), 63 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:48,182 INFO L175 Difference]: Start difference. First operand has 490 places, 2329 transitions, 86434 flow. Second operand 62 states and 657 transitions. [2023-11-29 06:30:48,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 3132 transitions, 118714 flow [2023-11-29 06:31:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 3132 transitions, 117391 flow, removed 641 selfloop flow, removed 9 redundant places. [2023-11-29 06:31:07,804 INFO L231 Difference]: Finished difference. Result has 556 places, 2836 transitions, 112040 flow [2023-11-29 06:31:07,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=85111, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=112040, PETRI_PLACES=556, PETRI_TRANSITIONS=2836} [2023-11-29 06:31:07,806 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 534 predicate places. [2023-11-29 06:31:07,807 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 2836 transitions, 112040 flow [2023-11-29 06:31:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.857142857142857) internal successors, (192), 28 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:07,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:07,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:07,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:31:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:08,008 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 06:31:08,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 552654723, now seen corresponding path program 21 times [2023-11-29 06:31:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004018113] [2023-11-29 06:31:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:08,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004018113] [2023-11-29 06:31:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004018113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271454290] [2023-11-29 06:31:08,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:31:08,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:08,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:08,356 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:08,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:31:08,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:31:08,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:08,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:31:08,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:09,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271454290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:09,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:09,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2023-11-29 06:31:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608902881] [2023-11-29 06:31:09,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:31:09,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:31:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:31:09,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:31:09,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2836 transitions, 112040 flow. Second operand has 23 states, 23 states have (on average 7.260869565217392) internal successors, (167), 23 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:09,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:31:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:26,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:35,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:40,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:42,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:49,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:01,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:07,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:08,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:14,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:19,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:25,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:33,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:32:44,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:33:14,251 INFO L124 PetriNetUnfolderBase]: 15267/28037 cut-off events. [2023-11-29 06:33:14,251 INFO L125 PetriNetUnfolderBase]: For 1807024/1807024 co-relation queries the response was YES. [2023-11-29 06:33:14,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396634 conditions, 28037 events. 15267/28037 cut-off events. For 1807024/1807024 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 253264 event pairs, 1058 based on Foata normal form. 45/28080 useless extension candidates. Maximal degree in co-relation 394834. Up to 19627 conditions per place. [2023-11-29 06:33:15,012 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 3396 selfloop transitions, 1038 changer transitions 61/4498 dead transitions. [2023-11-29 06:33:15,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 4498 transitions, 185370 flow [2023-11-29 06:33:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 06:33:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 06:33:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 478 transitions. [2023-11-29 06:33:15,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551684088269454 [2023-11-29 06:33:15,014 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 478 transitions. [2023-11-29 06:33:15,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 478 transitions. [2023-11-29 06:33:15,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:15,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 478 transitions. [2023-11-29 06:33:15,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 11.658536585365853) internal successors, (478), 41 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 21.0) internal successors, (882), 42 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,017 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 21.0) internal successors, (882), 42 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,017 INFO L175 Difference]: Start difference. First operand has 556 places, 2836 transitions, 112040 flow. Second operand 41 states and 478 transitions. [2023-11-29 06:33:15,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 4498 transitions, 185370 flow [2023-11-29 06:33:58,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 4498 transitions, 180179 flow, removed 2566 selfloop flow, removed 17 redundant places. [2023-11-29 06:33:58,524 INFO L231 Difference]: Finished difference. Result has 601 places, 3707 transitions, 152189 flow [2023-11-29 06:33:58,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107973, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=152189, PETRI_PLACES=601, PETRI_TRANSITIONS=3707} [2023-11-29 06:33:58,527 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 579 predicate places. [2023-11-29 06:33:58,527 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 3707 transitions, 152189 flow [2023-11-29 06:33:58,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.260869565217392) internal successors, (167), 23 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:58,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:58,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:58,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:58,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:58,728 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 06:33:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2057499877, now seen corresponding path program 22 times [2023-11-29 06:33:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336047828] [2023-11-29 06:33:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336047828] [2023-11-29 06:33:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336047828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008110338] [2023-11-29 06:33:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:33:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:59,064 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:59,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22c98050-8760-4638-a3a7-53b68aaeff24/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:33:59,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:33:59,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:59,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:33:59,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:59,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008110338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:00,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:00,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-29 06:34:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952573998] [2023-11-29 06:34:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:34:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:34:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:34:00,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 06:34:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 3707 transitions, 152189 flow. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 06:34:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:23,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:35:29,898 INFO L124 PetriNetUnfolderBase]: 17203/31916 cut-off events. [2023-11-29 06:35:29,898 INFO L125 PetriNetUnfolderBase]: For 2227795/2227795 co-relation queries the response was YES. [2023-11-29 06:35:30,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457855 conditions, 31916 events. 17203/31916 cut-off events. For 2227795/2227795 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 290778 event pairs, 1474 based on Foata normal form. 24/31938 useless extension candidates. Maximal degree in co-relation 455620. Up to 28173 conditions per place. [2023-11-29 06:35:30,942 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 3952 selfloop transitions, 475 changer transitions 44/4474 dead transitions. [2023-11-29 06:35:30,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 4474 transitions, 190018 flow [2023-11-29 06:35:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:35:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 06:35:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 368 transitions. [2023-11-29 06:35:30,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 06:35:30,944 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 368 transitions. [2023-11-29 06:35:30,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 368 transitions. [2023-11-29 06:35:30,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:30,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 368 transitions. [2023-11-29 06:35:30,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.5) internal successors, (368), 32 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 06:35:30,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:30,947 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 21.0) internal successors, (693), 33 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:30,947 INFO L175 Difference]: Start difference. First operand has 601 places, 3707 transitions, 152189 flow. Second operand 32 states and 368 transitions. [2023-11-29 06:35:30,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 4474 transitions, 190018 flow