./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/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_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/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_74ddb545-1140-4787-a396-ea6f8a91c616/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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:42:15,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:42:15,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:42:15,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:42:15,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:42:15,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:42:15,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:42:15,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:42:15,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:42:15,647 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:42:15,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:42:15,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:42:15,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:42:15,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:42:15,650 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:42:15,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:42:15,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:42:15,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:42:15,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:42:15,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:42:15,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:42:15,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:42:15,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:42:15,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:42:15,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:42:15,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:42:15,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:42:15,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:42:15,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:42:15,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:42:15,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:42:15,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:42:15,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:42:15,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:42:15,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:42:15,663 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:42:15,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:42:15,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:42:15,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:42:15,664 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:42:15,664 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:42:15,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:42:15,665 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_74ddb545-1140-4787-a396-ea6f8a91c616/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2023-11-29 03:42:15,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:42:15,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:42:15,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:42:15,897 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:42:15,898 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:42:15,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-29 03:42:18,577 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:42:18,779 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:42:18,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-29 03:42:18,787 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/data/ed5e05740/84aa1b3925f2445f8922c34a1dc11bd9/FLAG5dc260a87 [2023-11-29 03:42:18,798 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/data/ed5e05740/84aa1b3925f2445f8922c34a1dc11bd9 [2023-11-29 03:42:18,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:42:18,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:42:18,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:42:18,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:42:18,810 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:42:18,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:42:18" (1/1) ... [2023-11-29 03:42:18,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6890685a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:18, skipping insertion in model container [2023-11-29 03:42:18,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:42:18" (1/1) ... [2023-11-29 03:42:18,836 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:42:18,981 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_74ddb545-1140-4787-a396-ea6f8a91c616/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2023-11-29 03:42:18,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:42:19,002 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:42:19,023 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_74ddb545-1140-4787-a396-ea6f8a91c616/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2023-11-29 03:42:19,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:42:19,035 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:42:19,035 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:42:19,041 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:42:19,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19 WrapperNode [2023-11-29 03:42:19,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:42:19,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:42:19,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:42:19,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:42:19,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,085 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2023-11-29 03:42:19,085 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:42:19,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:42:19,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:42:19,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:42:19,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,119 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 2, 2, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 03:42:19,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,136 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:42:19,143 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:42:19,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:42:19,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:42:19,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (1/1) ... [2023-11-29 03:42:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:42:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:19,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:42:19,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:42:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:42:19,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:42:19,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:42:19,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:42:19,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:42:19,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:42:19,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:42:19,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:42:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:42:19,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:42:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:42:19,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:42:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:42:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:42:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:42:19,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:42:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:42:19,214 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 03:42:19,333 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:42:19,335 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:42:19,609 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:42:19,943 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:42:19,944 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 03:42:19,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:42:19 BoogieIcfgContainer [2023-11-29 03:42:19,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:42:19,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:42:19,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:42:19,949 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:42:19,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:42:18" (1/3) ... [2023-11-29 03:42:19,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccce8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:42:19, skipping insertion in model container [2023-11-29 03:42:19,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:42:19" (2/3) ... [2023-11-29 03:42:19,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccce8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:42:19, skipping insertion in model container [2023-11-29 03:42:19,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:42:19" (3/3) ... [2023-11-29 03:42:19,952 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-11-29 03:42:19,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:42:19,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:42:19,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:42:19,968 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:42:20,011 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:42:20,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 03:42:20,066 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-29 03:42:20,067 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:42:20,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-29 03:42:20,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 03:42:20,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-29 03:42:20,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:42:20,088 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;@8b0f7fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:42:20,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 03:42:20,101 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:42:20,101 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-29 03:42:20,101 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:42:20,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:20,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:20,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:20,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1407500385, now seen corresponding path program 1 times [2023-11-29 03:42:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:20,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113048222] [2023-11-29 03:42:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:20,471 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 03:42:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113048222] [2023-11-29 03:42:20,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113048222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:20,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:42:20,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:42:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65166824] [2023-11-29 03:42:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:20,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:42:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:42:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:42:20,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:42:20,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:20,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:20,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:42:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:20,753 INFO L124 PetriNetUnfolderBase]: 674/1046 cut-off events. [2023-11-29 03:42:20,753 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-29 03:42:20,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2130 conditions, 1046 events. 674/1046 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4176 event pairs, 140 based on Foata normal form. 1/1042 useless extension candidates. Maximal degree in co-relation 1718. Up to 740 conditions per place. [2023-11-29 03:42:20,765 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-29 03:42:20,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-29 03:42:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:42:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:42:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 03:42:20,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-29 03:42:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 03:42:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 03:42:20,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:20,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 03:42:20,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 03:42:20,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:20,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:20,785 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-29 03:42:20,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-29 03:42:20,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:42:20,804 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-29 03:42:20,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-29 03:42:20,810 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-29 03:42:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-29 03:42:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:20,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:20,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:20,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:42:20,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:20,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1911095539, now seen corresponding path program 1 times [2023-11-29 03:42:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:20,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566029464] [2023-11-29 03:42:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:20,978 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 03:42:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566029464] [2023-11-29 03:42:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566029464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:20,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:42:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:42:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269475212] [2023-11-29 03:42:20,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:42:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:42:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:42:20,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:20,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:20,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:20,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:20,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:21,371 INFO L124 PetriNetUnfolderBase]: 1318/2075 cut-off events. [2023-11-29 03:42:21,371 INFO L125 PetriNetUnfolderBase]: For 366/370 co-relation queries the response was YES. [2023-11-29 03:42:21,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4618 conditions, 2075 events. 1318/2075 cut-off events. For 366/370 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10151 event pairs, 773 based on Foata normal form. 0/2003 useless extension candidates. Maximal degree in co-relation 1192. Up to 1209 conditions per place. [2023-11-29 03:42:21,390 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 67 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-29 03:42:21,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 75 transitions, 350 flow [2023-11-29 03:42:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:42:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:42:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2023-11-29 03:42:21,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2023-11-29 03:42:21,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2023-11-29 03:42:21,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2023-11-29 03:42:21,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:21,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2023-11-29 03:42:21,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:21,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:21,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:21,397 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 5 states and 96 transitions. [2023-11-29 03:42:21,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 75 transitions, 350 flow [2023-11-29 03:42:21,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 75 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:42:21,401 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 126 flow [2023-11-29 03:42:21,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-11-29 03:42:21,402 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-29 03:42:21,403 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 126 flow [2023-11-29 03:42:21,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:21,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:21,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:42:21,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:21,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 381567994, now seen corresponding path program 1 times [2023-11-29 03:42:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:21,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574166177] [2023-11-29 03:42:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:21,566 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 03:42:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574166177] [2023-11-29 03:42:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574166177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:21,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:42:21,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:42:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555839584] [2023-11-29 03:42:21,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:42:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:42:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:42:21,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:21,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:21,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:21,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:21,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:21,914 INFO L124 PetriNetUnfolderBase]: 1154/1811 cut-off events. [2023-11-29 03:42:21,915 INFO L125 PetriNetUnfolderBase]: For 707/797 co-relation queries the response was YES. [2023-11-29 03:42:21,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4256 conditions, 1811 events. 1154/1811 cut-off events. For 707/797 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8465 event pairs, 759 based on Foata normal form. 0/1731 useless extension candidates. Maximal degree in co-relation 3004. Up to 1243 conditions per place. [2023-11-29 03:42:21,930 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-29 03:42:21,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 346 flow [2023-11-29 03:42:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:42:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:42:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2023-11-29 03:42:21,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2023-11-29 03:42:21,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 92 transitions. [2023-11-29 03:42:21,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 92 transitions. [2023-11-29 03:42:21,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:21,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 92 transitions. [2023-11-29 03:42:21,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 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 03:42:21,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:21,935 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:21,935 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 126 flow. Second operand 5 states and 92 transitions. [2023-11-29 03:42:21,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 346 flow [2023-11-29 03:42:21,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 69 transitions, 342 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 03:42:21,939 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 147 flow [2023-11-29 03:42:21,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-29 03:42:21,941 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-11-29 03:42:21,941 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 147 flow [2023-11-29 03:42:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:21,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:21,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:21,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:42:21,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:21,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1835319823, now seen corresponding path program 1 times [2023-11-29 03:42:21,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:21,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609032077] [2023-11-29 03:42:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:22,080 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 03:42:22,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609032077] [2023-11-29 03:42:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609032077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:42:22,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:42:22,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:42:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198324618] [2023-11-29 03:42:22,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:42:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:42:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:42:22,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:22,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:22,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:22,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:22,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:22,365 INFO L124 PetriNetUnfolderBase]: 969/1477 cut-off events. [2023-11-29 03:42:22,366 INFO L125 PetriNetUnfolderBase]: For 838/984 co-relation queries the response was YES. [2023-11-29 03:42:22,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 1477 events. 969/1477 cut-off events. For 838/984 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6221 event pairs, 663 based on Foata normal form. 0/1401 useless extension candidates. Maximal degree in co-relation 3091. Up to 1209 conditions per place. [2023-11-29 03:42:22,377 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 30 selfloop transitions, 2 changer transitions 27/62 dead transitions. [2023-11-29 03:42:22,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 333 flow [2023-11-29 03:42:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:42:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:42:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-29 03:42:22,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2023-11-29 03:42:22,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-29 03:42:22,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-29 03:42:22,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:22,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-29 03:42:22,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:22,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:22,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:22,381 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 147 flow. Second operand 5 states and 87 transitions. [2023-11-29 03:42:22,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 333 flow [2023-11-29 03:42:22,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:42:22,386 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 120 flow [2023-11-29 03:42:22,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-11-29 03:42:22,387 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-11-29 03:42:22,387 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 120 flow [2023-11-29 03:42:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:22,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:22,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:42:22,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2143116566, now seen corresponding path program 1 times [2023-11-29 03:42:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266170176] [2023-11-29 03:42:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:22,574 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 03:42:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:22,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266170176] [2023-11-29 03:42:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266170176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646614277] [2023-11-29 03:42:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:22,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:22,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:22,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:42:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:22,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:42:22,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:22,826 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 03:42:22,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:22,899 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 03:42:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646614277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:22,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-29 03:42:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392068175] [2023-11-29 03:42:22,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:42:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:42:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:42:22,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:42:22,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 120 flow. Second operand has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:22,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:22,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:42:22,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:23,610 INFO L124 PetriNetUnfolderBase]: 1650/2415 cut-off events. [2023-11-29 03:42:23,611 INFO L125 PetriNetUnfolderBase]: For 911/1067 co-relation queries the response was YES. [2023-11-29 03:42:23,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6448 conditions, 2415 events. 1650/2415 cut-off events. For 911/1067 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10944 event pairs, 319 based on Foata normal form. 0/2135 useless extension candidates. Maximal degree in co-relation 6429. Up to 722 conditions per place. [2023-11-29 03:42:23,625 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 108 selfloop transitions, 17 changer transitions 0/127 dead transitions. [2023-11-29 03:42:23,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 127 transitions, 665 flow [2023-11-29 03:42:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:42:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 03:42:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2023-11-29 03:42:23,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2023-11-29 03:42:23,627 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 168 transitions. [2023-11-29 03:42:23,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 168 transitions. [2023-11-29 03:42:23,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:23,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 168 transitions. [2023-11-29 03:42:23,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:23,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:23,631 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:23,631 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 120 flow. Second operand 11 states and 168 transitions. [2023-11-29 03:42:23,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 127 transitions, 665 flow [2023-11-29 03:42:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 127 transitions, 591 flow, removed 35 selfloop flow, removed 8 redundant places. [2023-11-29 03:42:23,644 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 187 flow [2023-11-29 03:42:23,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-29 03:42:23,646 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-11-29 03:42:23,646 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 187 flow [2023-11-29 03:42:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:23,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:23,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:23,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:42:23,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:23,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:23,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1695765920, now seen corresponding path program 2 times [2023-11-29 03:42:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:23,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098434447] [2023-11-29 03:42:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:23,981 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 03:42:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:23,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098434447] [2023-11-29 03:42:23,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098434447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:23,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355112097] [2023-11-29 03:42:23,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:23,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:23,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:23,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:42:24,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:24,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:42:24,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:24,176 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 03:42:24,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:24,264 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 03:42:24,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355112097] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:24,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:24,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-29 03:42:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538081803] [2023-11-29 03:42:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:42:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:42:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:42:24,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:42:24,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 187 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:24,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:24,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:42:24,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:24,833 INFO L124 PetriNetUnfolderBase]: 2072/3039 cut-off events. [2023-11-29 03:42:24,833 INFO L125 PetriNetUnfolderBase]: For 1686/1686 co-relation queries the response was YES. [2023-11-29 03:42:24,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 3039 events. 2072/3039 cut-off events. For 1686/1686 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14101 event pairs, 315 based on Foata normal form. 16/3054 useless extension candidates. Maximal degree in co-relation 8276. Up to 851 conditions per place. [2023-11-29 03:42:24,857 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 96 selfloop transitions, 29 changer transitions 0/127 dead transitions. [2023-11-29 03:42:24,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 127 transitions, 711 flow [2023-11-29 03:42:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:42:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 03:42:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2023-11-29 03:42:24,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2023-11-29 03:42:24,859 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 139 transitions. [2023-11-29 03:42:24,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 139 transitions. [2023-11-29 03:42:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 139 transitions. [2023-11-29 03:42:24,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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 03:42:24,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:24,861 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:24,861 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 187 flow. Second operand 9 states and 139 transitions. [2023-11-29 03:42:24,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 127 transitions, 711 flow [2023-11-29 03:42:24,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 127 transitions, 708 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:42:24,871 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 397 flow [2023-11-29 03:42:24,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-11-29 03:42:24,872 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2023-11-29 03:42:24,872 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 397 flow [2023-11-29 03:42:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:24,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:24,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:24,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:42:25,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:25,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:25,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1455928496, now seen corresponding path program 3 times [2023-11-29 03:42:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:25,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207298959] [2023-11-29 03:42:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:25,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:25,241 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 03:42:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207298959] [2023-11-29 03:42:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207298959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150704812] [2023-11-29 03:42:25,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:42:25,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:25,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:25,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:42:25,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:42:25,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:25,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:42:25,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:25,479 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 03:42:25,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:25,558 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 03:42:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150704812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:25,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-29 03:42:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064476697] [2023-11-29 03:42:25,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 03:42:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 03:42:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:42:25,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:42:25,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 397 flow. Second operand has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 15 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:25,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:25,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:42:25,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:26,685 INFO L124 PetriNetUnfolderBase]: 3053/4437 cut-off events. [2023-11-29 03:42:26,685 INFO L125 PetriNetUnfolderBase]: For 8028/8028 co-relation queries the response was YES. [2023-11-29 03:42:26,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15496 conditions, 4437 events. 3053/4437 cut-off events. For 8028/8028 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21789 event pairs, 531 based on Foata normal form. 20/4456 useless extension candidates. Maximal degree in co-relation 15465. Up to 1365 conditions per place. [2023-11-29 03:42:26,730 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 147 selfloop transitions, 62 changer transitions 0/211 dead transitions. [2023-11-29 03:42:26,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 211 transitions, 1455 flow [2023-11-29 03:42:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:42:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:42:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2023-11-29 03:42:26,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2023-11-29 03:42:26,732 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 225 transitions. [2023-11-29 03:42:26,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 225 transitions. [2023-11-29 03:42:26,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:26,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 225 transitions. [2023-11-29 03:42:26,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:26,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 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 03:42:26,736 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 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 03:42:26,736 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 397 flow. Second operand 14 states and 225 transitions. [2023-11-29 03:42:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 211 transitions, 1455 flow [2023-11-29 03:42:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 211 transitions, 1428 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 03:42:26,812 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 890 flow [2023-11-29 03:42:26,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=890, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2023-11-29 03:42:26,813 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2023-11-29 03:42:26,813 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 890 flow [2023-11-29 03:42:26,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 15 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:26,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:26,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:26,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:42:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:27,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:27,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1155158380, now seen corresponding path program 4 times [2023-11-29 03:42:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:27,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044871178] [2023-11-29 03:42:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:27,161 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 03:42:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044871178] [2023-11-29 03:42:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044871178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932440155] [2023-11-29 03:42:27,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:42:27,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:27,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:27,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:42:27,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:42:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:27,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:42:27,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:27,336 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 03:42:27,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:27,402 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 03:42:27,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932440155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:27,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:27,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 03:42:27,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041526035] [2023-11-29 03:42:27,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:27,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:42:27,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:42:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:42:27,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:42:27,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 890 flow. Second operand has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:27,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:27,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:42:27,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:29,117 INFO L124 PetriNetUnfolderBase]: 4498/6488 cut-off events. [2023-11-29 03:42:29,117 INFO L125 PetriNetUnfolderBase]: For 22541/22541 co-relation queries the response was YES. [2023-11-29 03:42:29,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26398 conditions, 6488 events. 4498/6488 cut-off events. For 22541/22541 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32421 event pairs, 312 based on Foata normal form. 24/6166 useless extension candidates. Maximal degree in co-relation 26358. Up to 1292 conditions per place. [2023-11-29 03:42:29,167 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 236 selfloop transitions, 163 changer transitions 0/400 dead transitions. [2023-11-29 03:42:29,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 400 transitions, 3611 flow [2023-11-29 03:42:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 03:42:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 03:42:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 364 transitions. [2023-11-29 03:42:29,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 03:42:29,171 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 364 transitions. [2023-11-29 03:42:29,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 364 transitions. [2023-11-29 03:42:29,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:29,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 364 transitions. [2023-11-29 03:42:29,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 14.0) internal successors, (364), 26 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:29,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 35.0) internal successors, (945), 27 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:29,176 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 35.0) internal successors, (945), 27 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:29,177 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 890 flow. Second operand 26 states and 364 transitions. [2023-11-29 03:42:29,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 400 transitions, 3611 flow [2023-11-29 03:42:29,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 400 transitions, 3436 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-29 03:42:29,382 INFO L231 Difference]: Finished difference. Result has 109 places, 210 transitions, 2315 flow [2023-11-29 03:42:29,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2315, PETRI_PLACES=109, PETRI_TRANSITIONS=210} [2023-11-29 03:42:29,383 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 72 predicate places. [2023-11-29 03:42:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 210 transitions, 2315 flow [2023-11-29 03:42:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:29,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:29,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:29,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:42:29,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:29,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:29,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2136198364, now seen corresponding path program 5 times [2023-11-29 03:42:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384881923] [2023-11-29 03:42:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:29,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,762 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 03:42:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384881923] [2023-11-29 03:42:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384881923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:29,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371891929] [2023-11-29 03:42:29,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:42:29,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:29,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:29,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:29,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:42:29,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:29,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:42:29,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:29,975 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 03:42:29,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:30,046 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 03:42:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371891929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:30,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 03:42:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178182745] [2023-11-29 03:42:30,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:30,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 03:42:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 03:42:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:42:30,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:42:30,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 210 transitions, 2315 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:30,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:30,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:42:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:31,549 INFO L124 PetriNetUnfolderBase]: 4990/7178 cut-off events. [2023-11-29 03:42:31,549 INFO L125 PetriNetUnfolderBase]: For 30489/30489 co-relation queries the response was YES. [2023-11-29 03:42:31,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32470 conditions, 7178 events. 4990/7178 cut-off events. For 30489/30489 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36146 event pairs, 459 based on Foata normal form. 20/7198 useless extension candidates. Maximal degree in co-relation 32419. Up to 1445 conditions per place. [2023-11-29 03:42:31,588 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 215 selfloop transitions, 227 changer transitions 0/443 dead transitions. [2023-11-29 03:42:31,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 443 transitions, 4490 flow [2023-11-29 03:42:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:42:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 03:42:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 314 transitions. [2023-11-29 03:42:31,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077922077922078 [2023-11-29 03:42:31,590 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 314 transitions. [2023-11-29 03:42:31,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 314 transitions. [2023-11-29 03:42:31,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:31,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 314 transitions. [2023-11-29 03:42:31,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 14.272727272727273) internal successors, (314), 22 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:31,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:31,593 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:31,593 INFO L175 Difference]: Start difference. First operand has 109 places, 210 transitions, 2315 flow. Second operand 22 states and 314 transitions. [2023-11-29 03:42:31,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 443 transitions, 4490 flow [2023-11-29 03:42:31,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 443 transitions, 4371 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-11-29 03:42:31,804 INFO L231 Difference]: Finished difference. Result has 132 places, 309 transitions, 3681 flow [2023-11-29 03:42:31,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3681, PETRI_PLACES=132, PETRI_TRANSITIONS=309} [2023-11-29 03:42:31,805 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2023-11-29 03:42:31,805 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 309 transitions, 3681 flow [2023-11-29 03:42:31,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:31,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:31,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:31,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:42:32,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:42:32,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:32,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1809052998, now seen corresponding path program 6 times [2023-11-29 03:42:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752210508] [2023-11-29 03:42:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:32,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:32,215 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 03:42:32,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752210508] [2023-11-29 03:42:32,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752210508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477113368] [2023-11-29 03:42:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:42:32,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:32,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:32,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:42:32,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 03:42:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:32,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:42:32,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:32,416 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 03:42:32,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:32,498 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 03:42:32,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477113368] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:32,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:32,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-29 03:42:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184035100] [2023-11-29 03:42:32,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:32,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:42:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:42:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-29 03:42:32,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:42:32,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 309 transitions, 3681 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:32,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:32,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:42:32,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:33,474 INFO L124 PetriNetUnfolderBase]: 4054/5859 cut-off events. [2023-11-29 03:42:33,474 INFO L125 PetriNetUnfolderBase]: For 34575/34575 co-relation queries the response was YES. [2023-11-29 03:42:33,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29337 conditions, 5859 events. 4054/5859 cut-off events. For 34575/34575 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29857 event pairs, 369 based on Foata normal form. 16/5874 useless extension candidates. Maximal degree in co-relation 29280. Up to 1888 conditions per place. [2023-11-29 03:42:33,506 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 202 selfloop transitions, 150 changer transitions 0/354 dead transitions. [2023-11-29 03:42:33,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 354 transitions, 4542 flow [2023-11-29 03:42:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:42:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 03:42:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2023-11-29 03:42:33,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2023-11-29 03:42:33,508 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 129 transitions. [2023-11-29 03:42:33,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 129 transitions. [2023-11-29 03:42:33,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:33,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 129 transitions. [2023-11-29 03:42:33,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:33,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 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 03:42:33,510 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 35.0) internal successors, (315), 9 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 03:42:33,510 INFO L175 Difference]: Start difference. First operand has 132 places, 309 transitions, 3681 flow. Second operand 8 states and 129 transitions. [2023-11-29 03:42:33,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 354 transitions, 4542 flow [2023-11-29 03:42:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 354 transitions, 4377 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-11-29 03:42:33,738 INFO L231 Difference]: Finished difference. Result has 135 places, 309 transitions, 3870 flow [2023-11-29 03:42:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3870, PETRI_PLACES=135, PETRI_TRANSITIONS=309} [2023-11-29 03:42:33,739 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2023-11-29 03:42:33,739 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 309 transitions, 3870 flow [2023-11-29 03:42:33,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:33,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:33,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:33,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:42:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:42:33,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:33,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1800251760, now seen corresponding path program 1 times [2023-11-29 03:42:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198440773] [2023-11-29 03:42:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:34,055 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 03:42:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198440773] [2023-11-29 03:42:34,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198440773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762228241] [2023-11-29 03:42:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:34,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:34,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:34,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:34,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:42:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:34,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:42:34,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:34,210 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 03:42:34,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:34,240 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 03:42:34,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762228241] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:34,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-29 03:42:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975762933] [2023-11-29 03:42:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:42:34,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:42:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:42:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:42:34,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:34,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 309 transitions, 3870 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:35,280 INFO L124 PetriNetUnfolderBase]: 4467/6573 cut-off events. [2023-11-29 03:42:35,280 INFO L125 PetriNetUnfolderBase]: For 52713/53111 co-relation queries the response was YES. [2023-11-29 03:42:35,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33240 conditions, 6573 events. 4467/6573 cut-off events. For 52713/53111 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34969 event pairs, 1261 based on Foata normal form. 477/6942 useless extension candidates. Maximal degree in co-relation 33184. Up to 3124 conditions per place. [2023-11-29 03:42:35,335 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 283 selfloop transitions, 43 changer transitions 0/391 dead transitions. [2023-11-29 03:42:35,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 391 transitions, 5682 flow [2023-11-29 03:42:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:42:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:42:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-29 03:42:35,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-29 03:42:35,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-29 03:42:35,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-29 03:42:35,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:35,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-29 03:42:35,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:35,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:35,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 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 03:42:35,340 INFO L175 Difference]: Start difference. First operand has 135 places, 309 transitions, 3870 flow. Second operand 5 states and 74 transitions. [2023-11-29 03:42:35,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 391 transitions, 5682 flow [2023-11-29 03:42:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 391 transitions, 5533 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 03:42:35,579 INFO L231 Difference]: Finished difference. Result has 137 places, 310 transitions, 4009 flow [2023-11-29 03:42:35,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4009, PETRI_PLACES=137, PETRI_TRANSITIONS=310} [2023-11-29 03:42:35,580 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 100 predicate places. [2023-11-29 03:42:35,580 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 310 transitions, 4009 flow [2023-11-29 03:42:35,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 03:42:35,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:35,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:35,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:42:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:42:35,782 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:35,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1562629762, now seen corresponding path program 1 times [2023-11-29 03:42:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:35,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283519690] [2023-11-29 03:42:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283519690] [2023-11-29 03:42:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283519690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614395558] [2023-11-29 03:42:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:36,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:36,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:36,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:42:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:42:36,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:36,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:42:36,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:42:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:36,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:37,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 03:42:37,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:42:37,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2023-11-29 03:42:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:37,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614395558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:37,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:37,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-29 03:42:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606919795] [2023-11-29 03:42:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:37,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:42:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:42:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:42:37,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:37,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 310 transitions, 4009 flow. Second operand has 24 states, 24 states have (on average 8.291666666666666) internal successors, (199), 24 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:37,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:37,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:37,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:39,575 INFO L124 PetriNetUnfolderBase]: 5824/8610 cut-off events. [2023-11-29 03:42:39,575 INFO L125 PetriNetUnfolderBase]: For 59740/59869 co-relation queries the response was YES. [2023-11-29 03:42:39,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44517 conditions, 8610 events. 5824/8610 cut-off events. For 59740/59869 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 47854 event pairs, 519 based on Foata normal form. 130/8740 useless extension candidates. Maximal degree in co-relation 43267. Up to 5964 conditions per place. [2023-11-29 03:42:39,647 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 702 selfloop transitions, 118 changer transitions 1/852 dead transitions. [2023-11-29 03:42:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 852 transitions, 12119 flow [2023-11-29 03:42:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:42:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 03:42:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 254 transitions. [2023-11-29 03:42:39,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838095238095238 [2023-11-29 03:42:39,649 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 254 transitions. [2023-11-29 03:42:39,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 254 transitions. [2023-11-29 03:42:39,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:39,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 254 transitions. [2023-11-29 03:42:39,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:39,653 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:39,653 INFO L175 Difference]: Start difference. First operand has 137 places, 310 transitions, 4009 flow. Second operand 15 states and 254 transitions. [2023-11-29 03:42:39,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 852 transitions, 12119 flow [2023-11-29 03:42:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 852 transitions, 12027 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:42:40,075 INFO L231 Difference]: Finished difference. Result has 155 places, 423 transitions, 5757 flow [2023-11-29 03:42:40,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5757, PETRI_PLACES=155, PETRI_TRANSITIONS=423} [2023-11-29 03:42:40,076 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 118 predicate places. [2023-11-29 03:42:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 423 transitions, 5757 flow [2023-11-29 03:42:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.291666666666666) internal successors, (199), 24 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:40,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:42:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:42:40,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:40,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -641601138, now seen corresponding path program 2 times [2023-11-29 03:42:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905964864] [2023-11-29 03:42:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905964864] [2023-11-29 03:42:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905964864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007236302] [2023-11-29 03:42:40,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:40,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:40,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:42:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:41,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:42:41,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:41,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:42:41,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:42:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:41,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:42:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007236302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:41,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:41,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-11-29 03:42:41,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765028688] [2023-11-29 03:42:41,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:41,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:42:41,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:42:41,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:42:41,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:42:41,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 423 transitions, 5757 flow. Second operand has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:41,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:41,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:42:41,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:44,805 INFO L124 PetriNetUnfolderBase]: 8421/12281 cut-off events. [2023-11-29 03:42:44,805 INFO L125 PetriNetUnfolderBase]: For 86568/86568 co-relation queries the response was YES. [2023-11-29 03:42:44,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67519 conditions, 12281 events. 8421/12281 cut-off events. For 86568/86568 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 69344 event pairs, 827 based on Foata normal form. 1/12282 useless extension candidates. Maximal degree in co-relation 65854. Up to 8683 conditions per place. [2023-11-29 03:42:44,897 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 781 selfloop transitions, 246 changer transitions 1/1031 dead transitions. [2023-11-29 03:42:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1031 transitions, 14991 flow [2023-11-29 03:42:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:42:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 03:42:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 405 transitions. [2023-11-29 03:42:44,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2023-11-29 03:42:44,900 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 405 transitions. [2023-11-29 03:42:44,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 405 transitions. [2023-11-29 03:42:44,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:44,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 405 transitions. [2023-11-29 03:42:44,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 13.064516129032258) internal successors, (405), 31 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:44,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:44,905 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:44,905 INFO L175 Difference]: Start difference. First operand has 155 places, 423 transitions, 5757 flow. Second operand 31 states and 405 transitions. [2023-11-29 03:42:44,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1031 transitions, 14991 flow [2023-11-29 03:42:45,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1031 transitions, 14783 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-11-29 03:42:45,569 INFO L231 Difference]: Finished difference. Result has 203 places, 630 transitions, 9115 flow [2023-11-29 03:42:45,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9115, PETRI_PLACES=203, PETRI_TRANSITIONS=630} [2023-11-29 03:42:45,570 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 166 predicate places. [2023-11-29 03:42:45,570 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 630 transitions, 9115 flow [2023-11-29 03:42:45,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:45,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:42:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:42:45,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:45,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2098648221, now seen corresponding path program 1 times [2023-11-29 03:42:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:45,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49383518] [2023-11-29 03:42:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:42:46,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:46,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49383518] [2023-11-29 03:42:46,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49383518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:46,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648664775] [2023-11-29 03:42:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:46,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:46,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:42:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:46,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:42:46,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:46,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:42:46,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:42:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:46,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:42:46,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648664775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:46,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:46,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 13 [2023-11-29 03:42:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889601120] [2023-11-29 03:42:46,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:42:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:42:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:42:46,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:42:46,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 630 transitions, 9115 flow. Second operand has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:46,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:46,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:42:46,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:49,762 INFO L124 PetriNetUnfolderBase]: 8523/12926 cut-off events. [2023-11-29 03:42:49,762 INFO L125 PetriNetUnfolderBase]: For 118517/119039 co-relation queries the response was YES. [2023-11-29 03:42:49,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78038 conditions, 12926 events. 8523/12926 cut-off events. For 118517/119039 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 81066 event pairs, 536 based on Foata normal form. 213/13073 useless extension candidates. Maximal degree in co-relation 77181. Up to 8089 conditions per place. [2023-11-29 03:42:49,881 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 517 selfloop transitions, 289 changer transitions 1/956 dead transitions. [2023-11-29 03:42:49,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 956 transitions, 14699 flow [2023-11-29 03:42:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:42:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 03:42:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 268 transitions. [2023-11-29 03:42:49,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-29 03:42:49,883 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 268 transitions. [2023-11-29 03:42:49,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 268 transitions. [2023-11-29 03:42:49,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:49,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 268 transitions. [2023-11-29 03:42:49,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 16.75) internal successors, (268), 16 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:49,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:49,885 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:49,885 INFO L175 Difference]: Start difference. First operand has 203 places, 630 transitions, 9115 flow. Second operand 16 states and 268 transitions. [2023-11-29 03:42:49,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 956 transitions, 14699 flow [2023-11-29 03:42:51,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 956 transitions, 14486 flow, removed 56 selfloop flow, removed 6 redundant places. [2023-11-29 03:42:51,037 INFO L231 Difference]: Finished difference. Result has 218 places, 754 transitions, 11559 flow [2023-11-29 03:42:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8906, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11559, PETRI_PLACES=218, PETRI_TRANSITIONS=754} [2023-11-29 03:42:51,038 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 181 predicate places. [2023-11-29 03:42:51,038 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 754 transitions, 11559 flow [2023-11-29 03:42:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:51,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:51,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:51,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:42:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:42:51,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:51,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1425555408, now seen corresponding path program 3 times [2023-11-29 03:42:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:51,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8596891] [2023-11-29 03:42:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:51,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:51,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8596891] [2023-11-29 03:42:51,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8596891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714951033] [2023-11-29 03:42:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:42:51,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:51,821 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:51,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:42:51,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:42:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:51,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:42:51,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:51,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:42:52,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:42:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:52,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:52,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 03:42:52,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:42:52,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2023-11-29 03:42:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:52,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714951033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:52,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:52,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-29 03:42:52,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071307849] [2023-11-29 03:42:52,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:52,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:42:52,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:42:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:42:52,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:42:52,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 754 transitions, 11559 flow. Second operand has 24 states, 24 states have (on average 8.875) internal successors, (213), 24 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:52,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:52,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:42:52,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:42:57,385 INFO L124 PetriNetUnfolderBase]: 10580/15616 cut-off events. [2023-11-29 03:42:57,385 INFO L125 PetriNetUnfolderBase]: For 165069/165304 co-relation queries the response was YES. [2023-11-29 03:42:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101942 conditions, 15616 events. 10580/15616 cut-off events. For 165069/165304 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 94996 event pairs, 1219 based on Foata normal form. 136/15703 useless extension candidates. Maximal degree in co-relation 100453. Up to 12549 conditions per place. [2023-11-29 03:42:57,534 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 819 selfloop transitions, 208 changer transitions 1/1106 dead transitions. [2023-11-29 03:42:57,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1106 transitions, 18807 flow [2023-11-29 03:42:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:42:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 03:42:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 237 transitions. [2023-11-29 03:42:57,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2023-11-29 03:42:57,535 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 237 transitions. [2023-11-29 03:42:57,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 237 transitions. [2023-11-29 03:42:57,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:42:57,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 237 transitions. [2023-11-29 03:42:57,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.8) internal successors, (237), 15 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:57,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:57,538 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:57,538 INFO L175 Difference]: Start difference. First operand has 218 places, 754 transitions, 11559 flow. Second operand 15 states and 237 transitions. [2023-11-29 03:42:57,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1106 transitions, 18807 flow [2023-11-29 03:42:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1106 transitions, 18522 flow, removed 132 selfloop flow, removed 4 redundant places. [2023-11-29 03:42:59,626 INFO L231 Difference]: Finished difference. Result has 234 places, 852 transitions, 13665 flow [2023-11-29 03:42:59,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13665, PETRI_PLACES=234, PETRI_TRANSITIONS=852} [2023-11-29 03:42:59,627 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 197 predicate places. [2023-11-29 03:42:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 852 transitions, 13665 flow [2023-11-29 03:42:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.875) internal successors, (213), 24 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:42:59,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:59,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:59,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:42:59,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:42:59,828 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:59,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1208597781, now seen corresponding path program 2 times [2023-11-29 03:42:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:59,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462809795] [2023-11-29 03:42:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:59,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462809795] [2023-11-29 03:43:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462809795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058476014] [2023-11-29 03:43:00,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:43:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:00,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:00,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:43:00,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:43:00,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:00,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:43:00,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:00,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:43:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:00,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:00,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:43:00,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 03:43:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058476014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:00,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 11 [2023-11-29 03:43:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104828751] [2023-11-29 03:43:00,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:00,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:43:00,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:43:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:43:00,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:43:00,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 852 transitions, 13665 flow. Second operand has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 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 03:43:00,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:43:00,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:43:00,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:43:04,549 INFO L124 PetriNetUnfolderBase]: 10476/15800 cut-off events. [2023-11-29 03:43:04,549 INFO L125 PetriNetUnfolderBase]: For 194578/195688 co-relation queries the response was YES. [2023-11-29 03:43:04,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108354 conditions, 15800 events. 10476/15800 cut-off events. For 194578/195688 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 101437 event pairs, 1065 based on Foata normal form. 348/15996 useless extension candidates. Maximal degree in co-relation 107036. Up to 12438 conditions per place. [2023-11-29 03:43:04,705 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 735 selfloop transitions, 170 changer transitions 1/1082 dead transitions. [2023-11-29 03:43:04,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1082 transitions, 18809 flow [2023-11-29 03:43:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:43:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 03:43:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2023-11-29 03:43:04,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883116883116883 [2023-11-29 03:43:04,706 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 188 transitions. [2023-11-29 03:43:04,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 188 transitions. [2023-11-29 03:43:04,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:43:04,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 188 transitions. [2023-11-29 03:43:04,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 17.09090909090909) internal successors, (188), 11 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:04,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:04,707 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:04,708 INFO L175 Difference]: Start difference. First operand has 234 places, 852 transitions, 13665 flow. Second operand 11 states and 188 transitions. [2023-11-29 03:43:04,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1082 transitions, 18809 flow [2023-11-29 03:43:06,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1082 transitions, 18438 flow, removed 114 selfloop flow, removed 6 redundant places. [2023-11-29 03:43:06,686 INFO L231 Difference]: Finished difference. Result has 242 places, 915 transitions, 14784 flow [2023-11-29 03:43:06,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=13317, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14784, PETRI_PLACES=242, PETRI_TRANSITIONS=915} [2023-11-29 03:43:06,687 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 205 predicate places. [2023-11-29 03:43:06,688 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 915 transitions, 14784 flow [2023-11-29 03:43:06,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 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 03:43:06,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:43:06,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:43:06,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:43:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:43:06,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:43:06,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2095042010, now seen corresponding path program 4 times [2023-11-29 03:43:06,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:06,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814147425] [2023-11-29 03:43:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814147425] [2023-11-29 03:43:07,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814147425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322567222] [2023-11-29 03:43:07,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:43:07,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:07,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:07,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:07,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:43:07,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:43:07,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:07,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:43:07,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:07,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:43:07,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:43:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:07,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322567222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:08,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:08,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2023-11-29 03:43:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949709921] [2023-11-29 03:43:08,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:43:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:43:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:43:08,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:43:08,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 915 transitions, 14784 flow. Second operand has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 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 03:43:08,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:43:08,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:43:08,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:43:16,096 INFO L124 PetriNetUnfolderBase]: 15475/22823 cut-off events. [2023-11-29 03:43:16,096 INFO L125 PetriNetUnfolderBase]: For 269879/269879 co-relation queries the response was YES. [2023-11-29 03:43:16,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158133 conditions, 22823 events. 15475/22823 cut-off events. For 269879/269879 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 146010 event pairs, 1362 based on Foata normal form. 2/22825 useless extension candidates. Maximal degree in co-relation 156813. Up to 17237 conditions per place. [2023-11-29 03:43:16,390 INFO L140 encePairwiseOnDemand]: 18/35 looper letters, 1128 selfloop transitions, 523 changer transitions 3/1657 dead transitions. [2023-11-29 03:43:16,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1657 transitions, 28657 flow [2023-11-29 03:43:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 03:43:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 03:43:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 613 transitions. [2023-11-29 03:43:16,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37264437689969604 [2023-11-29 03:43:16,393 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 613 transitions. [2023-11-29 03:43:16,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 613 transitions. [2023-11-29 03:43:16,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:43:16,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 613 transitions. [2023-11-29 03:43:16,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 13.042553191489361) internal successors, (613), 47 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:16,399 INFO L175 Difference]: Start difference. First operand has 242 places, 915 transitions, 14784 flow. Second operand 47 states and 613 transitions. [2023-11-29 03:43:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1657 transitions, 28657 flow [2023-11-29 03:43:19,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1657 transitions, 28402 flow, removed 92 selfloop flow, removed 2 redundant places. [2023-11-29 03:43:19,924 INFO L231 Difference]: Finished difference. Result has 307 places, 1209 transitions, 20650 flow [2023-11-29 03:43:19,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14555, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=20650, PETRI_PLACES=307, PETRI_TRANSITIONS=1209} [2023-11-29 03:43:19,925 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 270 predicate places. [2023-11-29 03:43:19,925 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 1209 transitions, 20650 flow [2023-11-29 03:43:19,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 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 03:43:19,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:43:19,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:43:19,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:43:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:43:20,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:43:20,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash 816968418, now seen corresponding path program 5 times [2023-11-29 03:43:20,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:20,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728580855] [2023-11-29 03:43:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:20,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:20,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728580855] [2023-11-29 03:43:20,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728580855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:20,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358463603] [2023-11-29 03:43:20,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:43:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:20,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:20,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:20,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:43:20,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:43:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:20,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:43:20,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:20,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:43:21,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:43:21,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-29 03:43:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:43:21,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358463603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:21,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:21,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2023-11-29 03:43:21,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470035907] [2023-11-29 03:43:21,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:21,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 03:43:21,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 03:43:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-11-29 03:43:21,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:43:21,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1209 transitions, 20650 flow. Second operand has 27 states, 27 states have (on average 7.481481481481482) internal successors, (202), 27 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:21,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:43:21,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:43:21,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:43:36,256 INFO L124 PetriNetUnfolderBase]: 28610/40919 cut-off events. [2023-11-29 03:43:36,257 INFO L125 PetriNetUnfolderBase]: For 674906/676094 co-relation queries the response was YES. [2023-11-29 03:43:36,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315079 conditions, 40919 events. 28610/40919 cut-off events. For 674906/676094 co-relation queries the response was YES. Maximal size of possible extension queue 1888. Compared 267515 event pairs, 1928 based on Foata normal form. 1041/41860 useless extension candidates. Maximal degree in co-relation 311570. Up to 26114 conditions per place. [2023-11-29 03:43:37,039 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 1637 selfloop transitions, 1286 changer transitions 2/3052 dead transitions. [2023-11-29 03:43:37,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 3052 transitions, 56975 flow [2023-11-29 03:43:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 03:43:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-29 03:43:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 663 transitions. [2023-11-29 03:43:37,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37885714285714284 [2023-11-29 03:43:37,042 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 663 transitions. [2023-11-29 03:43:37,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 663 transitions. [2023-11-29 03:43:37,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:43:37,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 663 transitions. [2023-11-29 03:43:37,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 13.26) internal successors, (663), 50 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:37,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 35.0) internal successors, (1785), 51 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:37,048 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 35.0) internal successors, (1785), 51 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:37,048 INFO L175 Difference]: Start difference. First operand has 307 places, 1209 transitions, 20650 flow. Second operand 50 states and 663 transitions. [2023-11-29 03:43:37,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 3052 transitions, 56975 flow [2023-11-29 03:43:48,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 3052 transitions, 55414 flow, removed 562 selfloop flow, removed 5 redundant places. [2023-11-29 03:43:48,888 INFO L231 Difference]: Finished difference. Result has 371 places, 2379 transitions, 43295 flow [2023-11-29 03:43:48,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=19822, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=43295, PETRI_PLACES=371, PETRI_TRANSITIONS=2379} [2023-11-29 03:43:48,889 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 334 predicate places. [2023-11-29 03:43:48,890 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 2379 transitions, 43295 flow [2023-11-29 03:43:48,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.481481481481482) internal successors, (202), 27 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:48,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:43:48,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:43:48,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:43:49,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:43:49,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:43:49,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:43:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1180532241, now seen corresponding path program 3 times [2023-11-29 03:43:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:43:49,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444262025] [2023-11-29 03:43:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:43:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:43:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:43:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:49,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:43:49,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444262025] [2023-11-29 03:43:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444262025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:43:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198809095] [2023-11-29 03:43:49,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:43:49,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:43:49,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:43:49,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:43:49,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:43:49,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:43:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:43:49,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:43:49,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:43:49,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:43:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:49,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:43:49,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:43:49,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 03:43:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:43:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198809095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:43:49,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:43:49,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 12 [2023-11-29 03:43:49,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908784166] [2023-11-29 03:43:49,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:43:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:43:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:43:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:43:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:43:49,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:43:49,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 2379 transitions, 43295 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:43:49,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:43:49,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:43:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:44:08,095 INFO L124 PetriNetUnfolderBase]: 25454/37612 cut-off events. [2023-11-29 03:44:08,096 INFO L125 PetriNetUnfolderBase]: For 795874/799722 co-relation queries the response was YES. [2023-11-29 03:44:08,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327765 conditions, 37612 events. 25454/37612 cut-off events. For 795874/799722 co-relation queries the response was YES. Maximal size of possible extension queue 1972. Compared 262900 event pairs, 1459 based on Foata normal form. 1521/38837 useless extension candidates. Maximal degree in co-relation 326046. Up to 28231 conditions per place. [2023-11-29 03:44:08,924 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 1788 selfloop transitions, 537 changer transitions 1/2643 dead transitions. [2023-11-29 03:44:08,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 2643 transitions, 52346 flow [2023-11-29 03:44:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:44:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 03:44:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2023-11-29 03:44:08,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2023-11-29 03:44:08,925 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 217 transitions. [2023-11-29 03:44:08,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 217 transitions. [2023-11-29 03:44:08,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:44:08,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 217 transitions. [2023-11-29 03:44:08,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 16.692307692307693) internal successors, (217), 13 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:08,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:08,927 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:08,927 INFO L175 Difference]: Start difference. First operand has 371 places, 2379 transitions, 43295 flow. Second operand 13 states and 217 transitions. [2023-11-29 03:44:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 2643 transitions, 52346 flow [2023-11-29 03:44:26,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 2643 transitions, 49453 flow, removed 1426 selfloop flow, removed 4 redundant places. [2023-11-29 03:44:26,586 INFO L231 Difference]: Finished difference. Result has 383 places, 2481 transitions, 43895 flow [2023-11-29 03:44:26,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=40414, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43895, PETRI_PLACES=383, PETRI_TRANSITIONS=2481} [2023-11-29 03:44:26,589 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 346 predicate places. [2023-11-29 03:44:26,589 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 2481 transitions, 43895 flow [2023-11-29 03:44:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:44:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:44:26,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:44:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:44:26,790 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:44:26,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:44:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash -620041369, now seen corresponding path program 4 times [2023-11-29 03:44:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:44:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340613645] [2023-11-29 03:44:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:44:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:44:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:44:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:44:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:44:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340613645] [2023-11-29 03:44:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340613645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:44:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490843402] [2023-11-29 03:44:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:44:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:44:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:44:27,091 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:44:27,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:44:27,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:44:27,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:44:27,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:44:27,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:44:27,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:44:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:44:27,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:44:27,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:44:27,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 03:44:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:44:27,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490843402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:44:27,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:44:27,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 12 [2023-11-29 03:44:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668956838] [2023-11-29 03:44:27,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:44:27,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:44:27,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:44:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:44:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:44:27,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 03:44:27,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 2481 transitions, 43895 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:27,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:44:27,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 03:44:27,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:44:48,765 INFO L124 PetriNetUnfolderBase]: 26981/39842 cut-off events. [2023-11-29 03:44:48,766 INFO L125 PetriNetUnfolderBase]: For 842683/846690 co-relation queries the response was YES. [2023-11-29 03:44:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348600 conditions, 39842 events. 26981/39842 cut-off events. For 842683/846690 co-relation queries the response was YES. Maximal size of possible extension queue 2016. Compared 279174 event pairs, 1475 based on Foata normal form. 1563/41120 useless extension candidates. Maximal degree in co-relation 346885. Up to 28844 conditions per place. [2023-11-29 03:44:49,533 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 1802 selfloop transitions, 676 changer transitions 1/2796 dead transitions. [2023-11-29 03:44:49,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 2796 transitions, 54264 flow [2023-11-29 03:44:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 03:44:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 03:44:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 248 transitions. [2023-11-29 03:44:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723809523809524 [2023-11-29 03:44:49,535 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 248 transitions. [2023-11-29 03:44:49,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 248 transitions. [2023-11-29 03:44:49,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:44:49,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 248 transitions. [2023-11-29 03:44:49,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.533333333333335) internal successors, (248), 15 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:49,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:49,536 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:44:49,536 INFO L175 Difference]: Start difference. First operand has 383 places, 2481 transitions, 43895 flow. Second operand 15 states and 248 transitions. [2023-11-29 03:44:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 2796 transitions, 54264 flow [2023-11-29 03:45:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2796 transitions, 52909 flow, removed 435 selfloop flow, removed 5 redundant places. [2023-11-29 03:45:05,957 INFO L231 Difference]: Finished difference. Result has 396 places, 2615 transitions, 47169 flow [2023-11-29 03:45:05,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=42660, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=47169, PETRI_PLACES=396, PETRI_TRANSITIONS=2615} [2023-11-29 03:45:05,960 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 359 predicate places. [2023-11-29 03:45:05,961 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 2615 transitions, 47169 flow [2023-11-29 03:45:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:05,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:45:05,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:45:05,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:45:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:45:06,162 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:45:06,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:45:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1453690462, now seen corresponding path program 6 times [2023-11-29 03:45:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:45:06,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361366530] [2023-11-29 03:45:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:45:06,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:45:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:45:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:45:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:45:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361366530] [2023-11-29 03:45:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361366530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:45:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467128016] [2023-11-29 03:45:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:45:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:45:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:45:06,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:45:06,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:45:06,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 03:45:06,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:45:06,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:45:06,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:45:06,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:45:06,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:45:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:45:06,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:45:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:45:07,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467128016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:45:07,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:45:07,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 03:45:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361061966] [2023-11-29 03:45:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:45:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:45:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:45:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:45:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:45:07,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:45:07,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 2615 transitions, 47169 flow. Second operand has 24 states, 24 states have (on average 7.458333333333333) internal successors, (179), 24 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:07,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:45:07,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:45:07,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:45:34,745 INFO L124 PetriNetUnfolderBase]: 32874/47370 cut-off events. [2023-11-29 03:45:34,745 INFO L125 PetriNetUnfolderBase]: For 980762/982135 co-relation queries the response was YES. [2023-11-29 03:45:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417723 conditions, 47370 events. 32874/47370 cut-off events. For 980762/982135 co-relation queries the response was YES. Maximal size of possible extension queue 2127. Compared 319390 event pairs, 1916 based on Foata normal form. 1046/48372 useless extension candidates. Maximal degree in co-relation 415859. Up to 32340 conditions per place. [2023-11-29 03:45:35,704 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 1971 selfloop transitions, 1375 changer transitions 1/3371 dead transitions. [2023-11-29 03:45:35,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 3371 transitions, 66828 flow [2023-11-29 03:45:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 03:45:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 03:45:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 576 transitions. [2023-11-29 03:45:35,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-29 03:45:35,706 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 576 transitions. [2023-11-29 03:45:35,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 576 transitions. [2023-11-29 03:45:35,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:45:35,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 576 transitions. [2023-11-29 03:45:35,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 12.0) internal successors, (576), 48 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:35,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 35.0) internal successors, (1715), 49 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:35,709 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 35.0) internal successors, (1715), 49 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:35,710 INFO L175 Difference]: Start difference. First operand has 396 places, 2615 transitions, 47169 flow. Second operand 48 states and 576 transitions. [2023-11-29 03:45:35,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 3371 transitions, 66828 flow [2023-11-29 03:45:58,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 3371 transitions, 65540 flow, removed 388 selfloop flow, removed 5 redundant places. [2023-11-29 03:45:58,427 INFO L231 Difference]: Finished difference. Result has 449 places, 2956 transitions, 56338 flow [2023-11-29 03:45:58,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=45912, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=56338, PETRI_PLACES=449, PETRI_TRANSITIONS=2956} [2023-11-29 03:45:58,430 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 412 predicate places. [2023-11-29 03:45:58,430 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 2956 transitions, 56338 flow [2023-11-29 03:45:58,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.458333333333333) internal successors, (179), 24 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:58,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:45:58,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:45:58,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:45:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:45:58,631 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:45:58,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:45:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -94932130, now seen corresponding path program 7 times [2023-11-29 03:45:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:45:58,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224101828] [2023-11-29 03:45:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:45:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:45:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:45:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:45:59,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:45:59,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224101828] [2023-11-29 03:45:59,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224101828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:45:59,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588358204] [2023-11-29 03:45:59,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:45:59,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:45:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:45:59,002 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:45:59,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:45:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:45:59,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:45:59,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:45:59,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:45:59,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:45:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:45:59,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:45:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:45:59,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588358204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:45:59,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:45:59,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-11-29 03:45:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661491632] [2023-11-29 03:45:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:45:59,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 03:45:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:45:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 03:45:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:45:59,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:45:59,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 2956 transitions, 56338 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:45:59,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:45:59,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:45:59,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:46:29,559 INFO L124 PetriNetUnfolderBase]: 34286/49435 cut-off events. [2023-11-29 03:46:29,559 INFO L125 PetriNetUnfolderBase]: For 1107839/1109221 co-relation queries the response was YES. [2023-11-29 03:46:30,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451551 conditions, 49435 events. 34286/49435 cut-off events. For 1107839/1109221 co-relation queries the response was YES. Maximal size of possible extension queue 2350. Compared 337070 event pairs, 2120 based on Foata normal form. 1081/50478 useless extension candidates. Maximal degree in co-relation 449571. Up to 35488 conditions per place. [2023-11-29 03:46:30,695 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 2220 selfloop transitions, 1274 changer transitions 1/3519 dead transitions. [2023-11-29 03:46:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 3519 transitions, 72665 flow [2023-11-29 03:46:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 03:46:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 03:46:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 416 transitions. [2023-11-29 03:46:30,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601731601731602 [2023-11-29 03:46:30,697 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 416 transitions. [2023-11-29 03:46:30,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 416 transitions. [2023-11-29 03:46:30,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:46:30,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 416 transitions. [2023-11-29 03:46:30,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 12.606060606060606) internal successors, (416), 33 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,701 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:30,701 INFO L175 Difference]: Start difference. First operand has 449 places, 2956 transitions, 56338 flow. Second operand 33 states and 416 transitions. [2023-11-29 03:46:30,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 3519 transitions, 72665 flow [2023-11-29 03:46:58,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 3519 transitions, 69781 flow, removed 1156 selfloop flow, removed 10 redundant places. [2023-11-29 03:46:58,159 INFO L231 Difference]: Finished difference. Result has 479 places, 3136 transitions, 60305 flow [2023-11-29 03:46:58,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=53610, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=60305, PETRI_PLACES=479, PETRI_TRANSITIONS=3136} [2023-11-29 03:46:58,162 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 442 predicate places. [2023-11-29 03:46:58,162 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 3136 transitions, 60305 flow [2023-11-29 03:46:58,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:58,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:46:58,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:58,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:46:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:58,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:46:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -423591748, now seen corresponding path program 8 times [2023-11-29 03:46:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848746206] [2023-11-29 03:46:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:58,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848746206] [2023-11-29 03:46:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848746206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288940963] [2023-11-29 03:46:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:46:58,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:58,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:58,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:46:58,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:46:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:58,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:46:58,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:59,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:46:59,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 03:46:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:46:59,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:46:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288940963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:59,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:46:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 03:46:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755057379] [2023-11-29 03:46:59,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:46:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:46:59,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:46:59,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 03:46:59,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 3136 transitions, 60305 flow. Second operand has 24 states, 24 states have (on average 7.458333333333333) internal successors, (179), 24 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:46:59,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:46:59,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 03:46:59,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:47:37,256 INFO L124 PetriNetUnfolderBase]: 37594/54503 cut-off events. [2023-11-29 03:47:37,256 INFO L125 PetriNetUnfolderBase]: For 1246051/1247301 co-relation queries the response was YES. [2023-11-29 03:47:38,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503988 conditions, 54503 events. 37594/54503 cut-off events. For 1246051/1247301 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 379931 event pairs, 2117 based on Foata normal form. 1005/55468 useless extension candidates. Maximal degree in co-relation 502237. Up to 36820 conditions per place. [2023-11-29 03:47:38,457 INFO L140 encePairwiseOnDemand]: 18/35 looper letters, 2067 selfloop transitions, 2303 changer transitions 1/4395 dead transitions. [2023-11-29 03:47:38,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 4395 transitions, 92481 flow [2023-11-29 03:47:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 03:47:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-29 03:47:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 667 transitions. [2023-11-29 03:47:38,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529100529100529 [2023-11-29 03:47:38,459 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 667 transitions. [2023-11-29 03:47:38,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 667 transitions. [2023-11-29 03:47:38,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:47:38,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 667 transitions. [2023-11-29 03:47:38,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 12.351851851851851) internal successors, (667), 54 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:38,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 35.0) internal successors, (1925), 55 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:38,463 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 35.0) internal successors, (1925), 55 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:47:38,463 INFO L175 Difference]: Start difference. First operand has 479 places, 3136 transitions, 60305 flow. Second operand 54 states and 667 transitions. [2023-11-29 03:47:38,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 4395 transitions, 92481 flow [2023-11-29 03:48:08,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 4395 transitions, 90800 flow, removed 567 selfloop flow, removed 12 redundant places. [2023-11-29 03:48:08,561 INFO L231 Difference]: Finished difference. Result has 534 places, 4004 transitions, 84229 flow [2023-11-29 03:48:08,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=59126, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=84229, PETRI_PLACES=534, PETRI_TRANSITIONS=4004} [2023-11-29 03:48:08,564 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 497 predicate places. [2023-11-29 03:48:08,564 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 4004 transitions, 84229 flow [2023-11-29 03:48:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.458333333333333) internal successors, (179), 24 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:08,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:48:08,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:48:08,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:48:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:08,765 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:48:08,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash 661361031, now seen corresponding path program 9 times [2023-11-29 03:48:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957294846] [2023-11-29 03:48:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:08,854 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 03:48:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957294846] [2023-11-29 03:48:08,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957294846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:48:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373260745] [2023-11-29 03:48:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:48:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:08,855 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:08,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:48:08,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:48:08,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:08,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:48:08,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:09,052 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 03:48:09,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:48:09,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373260745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:09,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:48:09,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-29 03:48:09,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58204398] [2023-11-29 03:48:09,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:48:09,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:09,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:48:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:48:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:48:09,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 4004 transitions, 84229 flow. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:48:09,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:48:09,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:48:09,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:49:23,056 INFO L124 PetriNetUnfolderBase]: 56851/81214 cut-off events. [2023-11-29 03:49:23,056 INFO L125 PetriNetUnfolderBase]: For 2218487/2218487 co-relation queries the response was YES. [2023-11-29 03:49:24,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800100 conditions, 81214 events. 56851/81214 cut-off events. For 2218487/2218487 co-relation queries the response was YES. Maximal size of possible extension queue 3469. Compared 566138 event pairs, 3806 based on Foata normal form. 1096/82310 useless extension candidates. Maximal degree in co-relation 797968. Up to 28897 conditions per place. [2023-11-29 03:49:25,222 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 5280 selfloop transitions, 1800 changer transitions 0/7081 dead transitions. [2023-11-29 03:49:25,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 7081 transitions, 163857 flow [2023-11-29 03:49:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 03:49:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 03:49:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 478 transitions. [2023-11-29 03:49:25,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42678571428571427 [2023-11-29 03:49:25,224 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 478 transitions. [2023-11-29 03:49:25,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 478 transitions. [2023-11-29 03:49:25,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:49:25,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 478 transitions. [2023-11-29 03:49:25,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 14.9375) internal successors, (478), 32 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 03:49:25,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:25,226 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:49:25,226 INFO L175 Difference]: Start difference. First operand has 534 places, 4004 transitions, 84229 flow. Second operand 32 states and 478 transitions. [2023-11-29 03:49:25,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 7081 transitions, 163857 flow [2023-11-29 03:50:48,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 7081 transitions, 160275 flow, removed 1460 selfloop flow, removed 17 redundant places. [2023-11-29 03:50:48,902 INFO L231 Difference]: Finished difference. Result has 571 places, 4766 transitions, 105584 flow [2023-11-29 03:50:48,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=80021, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=105584, PETRI_PLACES=571, PETRI_TRANSITIONS=4766} [2023-11-29 03:50:48,905 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 534 predicate places. [2023-11-29 03:50:48,905 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 4766 transitions, 105584 flow [2023-11-29 03:50:48,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:48,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:50:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:49,106 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:50:49,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1715509570, now seen corresponding path program 10 times [2023-11-29 03:50:49,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:49,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521625296] [2023-11-29 03:50:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:49,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:49,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521625296] [2023-11-29 03:50:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521625296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502064538] [2023-11-29 03:50:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:50:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:49,198 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:49,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:50:49,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:50:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:49,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:50:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:49,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502064538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:49,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:49,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-29 03:50:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15124778] [2023-11-29 03:50:49,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:50:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:50:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:50:49,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 03:50:49,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 4766 transitions, 105584 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:49,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:49,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 03:50:49,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:52:21,152 INFO L124 PetriNetUnfolderBase]: 59226/85538 cut-off events. [2023-11-29 03:52:21,152 INFO L125 PetriNetUnfolderBase]: For 2659099/2659099 co-relation queries the response was YES. [2023-11-29 03:52:23,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893434 conditions, 85538 events. 59226/85538 cut-off events. For 2659099/2659099 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 615527 event pairs, 3378 based on Foata normal form. 3260/88798 useless extension candidates. Maximal degree in co-relation 891568. Up to 30547 conditions per place. [2023-11-29 03:52:23,685 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 5239 selfloop transitions, 2820 changer transitions 9/8069 dead transitions. [2023-11-29 03:52:23,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 8069 transitions, 189742 flow [2023-11-29 03:52:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 03:52:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 03:52:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 511 transitions. [2023-11-29 03:52:23,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945945945945946 [2023-11-29 03:52:23,687 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 511 transitions. [2023-11-29 03:52:23,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 511 transitions. [2023-11-29 03:52:23,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:52:23,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 511 transitions. [2023-11-29 03:52:23,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 13.81081081081081) internal successors, (511), 37 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:23,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:23,691 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:52:23,692 INFO L175 Difference]: Start difference. First operand has 571 places, 4766 transitions, 105584 flow. Second operand 37 states and 511 transitions. [2023-11-29 03:52:23,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 8069 transitions, 189742 flow [2023-11-29 03:54:54,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 8069 transitions, 183045 flow, removed 2023 selfloop flow, removed 9 redundant places. [2023-11-29 03:54:54,517 INFO L231 Difference]: Finished difference. Result has 605 places, 5365 transitions, 123982 flow [2023-11-29 03:54:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90253, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1648, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=123982, PETRI_PLACES=605, PETRI_TRANSITIONS=5365} [2023-11-29 03:54:54,520 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 568 predicate places. [2023-11-29 03:54:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 5365 transitions, 123982 flow [2023-11-29 03:54:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:54,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:54:54,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:54,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:54:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:54,721 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:54:54,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1677919106, now seen corresponding path program 5 times [2023-11-29 03:54:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:54,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018658896] [2023-11-29 03:54:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:54,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018658896] [2023-11-29 03:54:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018658896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077344965] [2023-11-29 03:54:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:54:54,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:54,808 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:54,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ddb545-1140-4787-a396-ea6f8a91c616/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:54:54,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:54:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:54,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:54:54,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:55,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:55,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077344965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:55,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 03:54:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596461829] [2023-11-29 03:54:55,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 03:54:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 03:54:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:54:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 03:54:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 5365 transitions, 123982 flow. Second operand has 15 states, 15 states have (on average 9.6) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:54:55,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 03:54:55,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand