./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/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_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:26:33,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:26:33,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 02:26:33,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:26:33,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:26:33,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:26:33,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:26:33,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:26:33,312 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:26:33,312 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:26:33,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:26:33,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:26:33,314 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:26:33,315 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:26:33,315 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:26:33,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:26:33,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:26:33,317 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:26:33,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:26:33,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:26:33,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:26:33,319 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:26:33,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:26:33,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:26:33,320 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 02:26:33,320 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:26:33,321 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:26:33,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:26:33,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:26:33,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:26:33,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:26:33,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:26:33,323 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:26:33,323 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:33,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:26:33,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:26:33,324 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:26:33,324 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:26:33,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:26:33,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:26:33,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:26:33,325 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:26:33,325 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:26:33,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:26:33,326 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_77b26410-5da3-495a-a848-1e07ad2176d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2023-11-29 02:26:33,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:26:33,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:26:33,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:26:33,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:26:33,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:26:33,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-29 02:26:36,268 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:26:36,464 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:26:36,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-29 02:26:36,474 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/data/49cde9523/fe9d05c5c93b426788bb9bb7eb268d04/FLAG6065ee98b [2023-11-29 02:26:36,489 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/data/49cde9523/fe9d05c5c93b426788bb9bb7eb268d04 [2023-11-29 02:26:36,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:26:36,493 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:26:36,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:36,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:26:36,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:26:36,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39557de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36, skipping insertion in model container [2023-11-29 02:26:36,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,530 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:26:36,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:36,729 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:26:36,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:36,771 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:26:36,771 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:26:36,779 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:26:36,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36 WrapperNode [2023-11-29 02:26:36,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:36,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:36,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:26:36,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:26:36,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,825 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 364 [2023-11-29 02:26:36,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:36,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:26:36,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:26:36,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:26:36,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,844 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,868 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 2, 10, 2]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 3, 1]. [2023-11-29 02:26:36,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:26:36,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:26:36,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:26:36,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:26:36,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (1/1) ... [2023-11-29 02:26:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:36,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:26:36,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:26:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:26:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:26:36,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:26:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:26:36,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:26:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 02:26:36,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 02:26:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:26:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:26:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:26:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:26:36,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:26:36,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:26:36,973 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 02:26:37,107 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:26:37,110 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:26:37,563 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:26:37,984 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:26:37,984 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 02:26:37,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:37 BoogieIcfgContainer [2023-11-29 02:26:37,985 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:26:37,987 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:26:37,987 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:26:37,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:26:37,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:26:36" (1/3) ... [2023-11-29 02:26:37,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234a5037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:37, skipping insertion in model container [2023-11-29 02:26:37,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:36" (2/3) ... [2023-11-29 02:26:37,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234a5037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:37, skipping insertion in model container [2023-11-29 02:26:37,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:37" (3/3) ... [2023-11-29 02:26:37,993 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-11-29 02:26:38,003 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:26:38,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:26:38,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-29 02:26:38,014 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:26:38,129 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 02:26:38,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 203 flow [2023-11-29 02:26:38,206 INFO L124 PetriNetUnfolderBase]: 8/88 cut-off events. [2023-11-29 02:26:38,206 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:26:38,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 88 events. 8/88 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-11-29 02:26:38,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 203 flow [2023-11-29 02:26:38,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 86 transitions, 187 flow [2023-11-29 02:26:38,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:26:38,231 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;@3b5f2377, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:26:38,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-11-29 02:26:38,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:26:38,236 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 02:26:38,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:26:38,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:38,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:26:38,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1052061, now seen corresponding path program 1 times [2023-11-29 02:26:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038817853] [2023-11-29 02:26:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:38,545 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 02:26:38,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:38,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038817853] [2023-11-29 02:26:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038817853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:38,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:38,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534424815] [2023-11-29 02:26:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:38,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:38,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2023-11-29 02:26:38,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:38,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:38,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2023-11-29 02:26:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:40,110 INFO L124 PetriNetUnfolderBase]: 6215/10334 cut-off events. [2023-11-29 02:26:40,111 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-11-29 02:26:40,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19259 conditions, 10334 events. 6215/10334 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 75231 event pairs, 5657 based on Foata normal form. 507/7257 useless extension candidates. Maximal degree in co-relation 17888. Up to 8559 conditions per place. [2023-11-29 02:26:40,187 INFO L140 encePairwiseOnDemand]: 66/91 looper letters, 54 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2023-11-29 02:26:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 86 transitions, 315 flow [2023-11-29 02:26:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:26:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:26:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2023-11-29 02:26:40,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2023-11-29 02:26:40,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 179 transitions. [2023-11-29 02:26:40,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 179 transitions. [2023-11-29 02:26:40,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:40,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 179 transitions. [2023-11-29 02:26:40,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 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 02:26:40,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,210 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 187 flow. Second operand 4 states and 179 transitions. [2023-11-29 02:26:40,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 86 transitions, 315 flow [2023-11-29 02:26:40,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 306 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 02:26:40,222 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 248 flow [2023-11-29 02:26:40,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2023-11-29 02:26:40,226 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-11-29 02:26:40,226 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 248 flow [2023-11-29 02:26:40,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:40,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 02:26:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:26:40,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:40,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1278263875, now seen corresponding path program 1 times [2023-11-29 02:26:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:40,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718233499] [2023-11-29 02:26:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718233499] [2023-11-29 02:26:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718233499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487025954] [2023-11-29 02:26:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:40,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:40,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:40,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:26:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:40,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:26:40,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:40,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:40,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487025954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:40,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:40,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 02:26:40,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377235069] [2023-11-29 02:26:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:40,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:26:40,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:26:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:26:40,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2023-11-29 02:26:40,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:40,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2023-11-29 02:26:40,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:41,938 INFO L124 PetriNetUnfolderBase]: 6215/10331 cut-off events. [2023-11-29 02:26:41,939 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-29 02:26:41,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19163 conditions, 10331 events. 6215/10331 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 75295 event pairs, 5657 based on Foata normal form. 3/6755 useless extension candidates. Maximal degree in co-relation 19090. Up to 8544 conditions per place. [2023-11-29 02:26:42,020 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 44 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2023-11-29 02:26:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 358 flow [2023-11-29 02:26:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:26:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:26:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2023-11-29 02:26:42,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39194139194139194 [2023-11-29 02:26:42,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 214 transitions. [2023-11-29 02:26:42,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 214 transitions. [2023-11-29 02:26:42,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:42,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 214 transitions. [2023-11-29 02:26:42,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.666666666666664) internal successors, (214), 6 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,030 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,030 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 248 flow. Second operand 6 states and 214 transitions. [2023-11-29 02:26:42,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 358 flow [2023-11-29 02:26:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:26:42,034 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 270 flow [2023-11-29 02:26:42,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-11-29 02:26:42,034 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-11-29 02:26:42,035 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 270 flow [2023-11-29 02:26:42,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:42,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 02:26:42,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:42,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 02:26:42,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:42,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 971475555, now seen corresponding path program 1 times [2023-11-29 02:26:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:42,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696806528] [2023-11-29 02:26:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:42,324 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 02:26:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696806528] [2023-11-29 02:26:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696806528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143607689] [2023-11-29 02:26:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:42,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:42,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:42,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:26:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:42,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:26:42,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:42,475 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 02:26:42,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:42,517 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 02:26:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143607689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:42,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 02:26:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786782274] [2023-11-29 02:26:42,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:26:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:26:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:26:42,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2023-11-29 02:26:42,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 270 flow. Second operand has 12 states, 12 states have (on average 26.083333333333332) internal successors, (313), 12 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:42,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2023-11-29 02:26:42,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:43,872 INFO L124 PetriNetUnfolderBase]: 6224/10367 cut-off events. [2023-11-29 02:26:43,872 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-29 02:26:43,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19304 conditions, 10367 events. 6224/10367 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 75673 event pairs, 5657 based on Foata normal form. 9/6797 useless extension candidates. Maximal degree in co-relation 19092. Up to 8559 conditions per place. [2023-11-29 02:26:43,929 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 51 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2023-11-29 02:26:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 620 flow [2023-11-29 02:26:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:26:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:26:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 347 transitions. [2023-11-29 02:26:43,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813186813186813 [2023-11-29 02:26:43,932 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 347 transitions. [2023-11-29 02:26:43,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 347 transitions. [2023-11-29 02:26:43,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:43,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 347 transitions. [2023-11-29 02:26:43,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,939 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,939 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 270 flow. Second operand 10 states and 347 transitions. [2023-11-29 02:26:43,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 620 flow [2023-11-29 02:26:43,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 537 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-29 02:26:43,945 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 485 flow [2023-11-29 02:26:43,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=485, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-11-29 02:26:43,946 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-11-29 02:26:43,946 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 485 flow [2023-11-29 02:26:43,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.083333333333332) internal successors, (313), 12 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:43,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:43,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:26:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:44,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:44,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1247462354, now seen corresponding path program 1 times [2023-11-29 02:26:44,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:44,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218354172] [2023-11-29 02:26:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:44,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:44,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218354172] [2023-11-29 02:26:44,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218354172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:44,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:44,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:44,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108401694] [2023-11-29 02:26:44,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:44,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:44,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:44,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:44,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:44,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:45,749 INFO L124 PetriNetUnfolderBase]: 6452/10824 cut-off events. [2023-11-29 02:26:45,749 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-11-29 02:26:45,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20253 conditions, 10824 events. 6452/10824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 78688 event pairs, 5864 based on Foata normal form. 154/7429 useless extension candidates. Maximal degree in co-relation 20095. Up to 8585 conditions per place. [2023-11-29 02:26:45,795 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 122 selfloop transitions, 10 changer transitions 1/158 dead transitions. [2023-11-29 02:26:45,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 158 transitions, 1003 flow [2023-11-29 02:26:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:26:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:26:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2023-11-29 02:26:45,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340659340659341 [2023-11-29 02:26:45,797 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 243 transitions. [2023-11-29 02:26:45,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 243 transitions. [2023-11-29 02:26:45,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:45,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 243 transitions. [2023-11-29 02:26:45,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:45,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:45,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:45,800 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 485 flow. Second operand 5 states and 243 transitions. [2023-11-29 02:26:45,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 158 transitions, 1003 flow [2023-11-29 02:26:45,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 158 transitions, 943 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:45,806 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 552 flow [2023-11-29 02:26:45,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2023-11-29 02:26:45,807 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 7 predicate places. [2023-11-29 02:26:45,808 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 552 flow [2023-11-29 02:26:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:45,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:45,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:26:45,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:45,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1092190024, now seen corresponding path program 1 times [2023-11-29 02:26:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794886053] [2023-11-29 02:26:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:46,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794886053] [2023-11-29 02:26:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794886053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918925716] [2023-11-29 02:26:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:46,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:46,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:46,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:26:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:46,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:26:46,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:26:46,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918925716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-29 02:26:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687098986] [2023-11-29 02:26:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:46,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:46,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:46,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 552 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:46,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:46,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:46,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:47,021 INFO L124 PetriNetUnfolderBase]: 4868/8363 cut-off events. [2023-11-29 02:26:47,021 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2023-11-29 02:26:47,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16176 conditions, 8363 events. 4868/8363 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 59266 event pairs, 4380 based on Foata normal form. 0/5955 useless extension candidates. Maximal degree in co-relation 16020. Up to 6794 conditions per place. [2023-11-29 02:26:47,053 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 88 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-29 02:26:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 718 flow [2023-11-29 02:26:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-29 02:26:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201465201465202 [2023-11-29 02:26:47,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-29 02:26:47,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-29 02:26:47,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:47,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-29 02:26:47,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:47,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:47,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:47,056 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 552 flow. Second operand 3 states and 142 transitions. [2023-11-29 02:26:47,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 718 flow [2023-11-29 02:26:47,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 714 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:47,062 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 538 flow [2023-11-29 02:26:47,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2023-11-29 02:26:47,063 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-11-29 02:26:47,063 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 538 flow [2023-11-29 02:26:47,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:47,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:47,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:47,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:26:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:47,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:47,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -791097352, now seen corresponding path program 1 times [2023-11-29 02:26:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:47,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824067420] [2023-11-29 02:26:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:47,310 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 02:26:47,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824067420] [2023-11-29 02:26:47,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824067420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:47,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:47,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704186649] [2023-11-29 02:26:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:47,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:47,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:47,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:47,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:47,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:47,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:47,985 INFO L124 PetriNetUnfolderBase]: 4414/7265 cut-off events. [2023-11-29 02:26:47,985 INFO L125 PetriNetUnfolderBase]: For 875/875 co-relation queries the response was YES. [2023-11-29 02:26:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 7265 events. 4414/7265 cut-off events. For 875/875 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 46716 event pairs, 1630 based on Foata normal form. 111/5326 useless extension candidates. Maximal degree in co-relation 14721. Up to 5165 conditions per place. [2023-11-29 02:26:48,019 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 106 selfloop transitions, 2 changer transitions 1/134 dead transitions. [2023-11-29 02:26:48,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 134 transitions, 805 flow [2023-11-29 02:26:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-29 02:26:48,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2023-11-29 02:26:48,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-29 02:26:48,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-29 02:26:48,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:48,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-29 02:26:48,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:48,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:48,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:48,023 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 538 flow. Second operand 3 states and 161 transitions. [2023-11-29 02:26:48,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 134 transitions, 805 flow [2023-11-29 02:26:48,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 804 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:48,027 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 542 flow [2023-11-29 02:26:48,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=542, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2023-11-29 02:26:48,027 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 7 predicate places. [2023-11-29 02:26:48,027 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 542 flow [2023-11-29 02:26:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:48,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:48,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:26:48,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:48,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash -501846508, now seen corresponding path program 1 times [2023-11-29 02:26:48,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:48,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753073420] [2023-11-29 02:26:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:48,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:26:48,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:48,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753073420] [2023-11-29 02:26:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753073420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:48,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883237060] [2023-11-29 02:26:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:48,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:48,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 542 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:48,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:48,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:48,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:48,921 INFO L124 PetriNetUnfolderBase]: 5009/8575 cut-off events. [2023-11-29 02:26:48,921 INFO L125 PetriNetUnfolderBase]: For 1541/1571 co-relation queries the response was YES. [2023-11-29 02:26:48,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17908 conditions, 8575 events. 5009/8575 cut-off events. For 1541/1571 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 58515 event pairs, 2310 based on Foata normal form. 150/6531 useless extension candidates. Maximal degree in co-relation 17890. Up to 3997 conditions per place. [2023-11-29 02:26:48,961 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 110 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2023-11-29 02:26:48,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 826 flow [2023-11-29 02:26:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-29 02:26:48,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2023-11-29 02:26:48,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-29 02:26:48,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-29 02:26:48,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:48,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-29 02:26:48,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:48,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:48,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:48,965 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 542 flow. Second operand 3 states and 164 transitions. [2023-11-29 02:26:48,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 826 flow [2023-11-29 02:26:48,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:48,970 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 554 flow [2023-11-29 02:26:48,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=554, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2023-11-29 02:26:48,970 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 9 predicate places. [2023-11-29 02:26:48,970 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 554 flow [2023-11-29 02:26:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:48,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:48,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:48,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:26:48,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:48,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1277708715, now seen corresponding path program 1 times [2023-11-29 02:26:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:48,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906169152] [2023-11-29 02:26:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:26:49,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906169152] [2023-11-29 02:26:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906169152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:49,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:49,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161486333] [2023-11-29 02:26:49,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:49,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:49,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:49,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:49,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:49,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:49,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:49,656 INFO L124 PetriNetUnfolderBase]: 3612/6636 cut-off events. [2023-11-29 02:26:49,656 INFO L125 PetriNetUnfolderBase]: For 1133/1136 co-relation queries the response was YES. [2023-11-29 02:26:49,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13868 conditions, 6636 events. 3612/6636 cut-off events. For 1133/1136 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 46998 event pairs, 2188 based on Foata normal form. 15/5088 useless extension candidates. Maximal degree in co-relation 13848. Up to 5106 conditions per place. [2023-11-29 02:26:49,684 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 97 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2023-11-29 02:26:49,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 125 transitions, 781 flow [2023-11-29 02:26:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 02:26:49,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2023-11-29 02:26:49,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 02:26:49,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 02:26:49,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:49,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 02:26:49,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:49,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:49,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:26:49,687 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 554 flow. Second operand 3 states and 150 transitions. [2023-11-29 02:26:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 125 transitions, 781 flow [2023-11-29 02:26:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 779 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:49,691 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 575 flow [2023-11-29 02:26:49,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=575, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2023-11-29 02:26:49,691 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 11 predicate places. [2023-11-29 02:26:49,691 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 575 flow [2023-11-29 02:26:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:49,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:49,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 02:26:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:26:49,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:49,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash -448987703, now seen corresponding path program 2 times [2023-11-29 02:26:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566568597] [2023-11-29 02:26:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:49,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566568597] [2023-11-29 02:26:49,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566568597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:49,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680090994] [2023-11-29 02:26:49,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:26:49,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:49,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:49,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:26:49,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:26:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:26:49,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:26:49,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:26:49,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:26:50,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680090994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:50,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:50,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 02:26:50,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448357335] [2023-11-29 02:26:50,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:50,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:26:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:26:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:26:50,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2023-11-29 02:26:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 575 flow. Second operand has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2023-11-29 02:26:50,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:51,092 INFO L124 PetriNetUnfolderBase]: 3617/6666 cut-off events. [2023-11-29 02:26:51,092 INFO L125 PetriNetUnfolderBase]: For 2087/2087 co-relation queries the response was YES. [2023-11-29 02:26:51,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 6666 events. 3617/6666 cut-off events. For 2087/2087 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47605 event pairs, 3031 based on Foata normal form. 6/5103 useless extension candidates. Maximal degree in co-relation 14379. Up to 5311 conditions per place. [2023-11-29 02:26:51,124 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 48 selfloop transitions, 56 changer transitions 0/126 dead transitions. [2023-11-29 02:26:51,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 844 flow [2023-11-29 02:26:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:26:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 02:26:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 697 transitions. [2023-11-29 02:26:51,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3191391941391941 [2023-11-29 02:26:51,130 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 697 transitions. [2023-11-29 02:26:51,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 697 transitions. [2023-11-29 02:26:51,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:51,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 697 transitions. [2023-11-29 02:26:51,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 29.041666666666668) internal successors, (697), 24 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:51,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 91.0) internal successors, (2275), 25 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:51,139 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 91.0) internal successors, (2275), 25 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:51,139 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 575 flow. Second operand 24 states and 697 transitions. [2023-11-29 02:26:51,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 844 flow [2023-11-29 02:26:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 835 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:51,149 INFO L231 Difference]: Finished difference. Result has 122 places, 126 transitions, 764 flow [2023-11-29 02:26:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=764, PETRI_PLACES=122, PETRI_TRANSITIONS=126} [2023-11-29 02:26:51,150 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 34 predicate places. [2023-11-29 02:26:51,150 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 126 transitions, 764 flow [2023-11-29 02:26:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:51,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:51,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:51,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:26:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:51,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:51,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1795588922, now seen corresponding path program 1 times [2023-11-29 02:26:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590989074] [2023-11-29 02:26:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:26:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590989074] [2023-11-29 02:26:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590989074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:51,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:51,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546651730] [2023-11-29 02:26:51,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:51,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:51,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:51,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:26:51,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 764 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:51,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:51,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:26:51,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:52,458 INFO L124 PetriNetUnfolderBase]: 3818/7094 cut-off events. [2023-11-29 02:26:52,458 INFO L125 PetriNetUnfolderBase]: For 1615/1615 co-relation queries the response was YES. [2023-11-29 02:26:52,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15089 conditions, 7094 events. 3818/7094 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 50304 event pairs, 3223 based on Foata normal form. 44/5569 useless extension candidates. Maximal degree in co-relation 15064. Up to 5364 conditions per place. [2023-11-29 02:26:52,491 INFO L140 encePairwiseOnDemand]: 82/91 looper letters, 104 selfloop transitions, 11 changer transitions 22/161 dead transitions. [2023-11-29 02:26:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 161 transitions, 1255 flow [2023-11-29 02:26:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:26:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:26:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2023-11-29 02:26:52,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-11-29 02:26:52,493 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 230 transitions. [2023-11-29 02:26:52,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 230 transitions. [2023-11-29 02:26:52,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:52,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 230 transitions. [2023-11-29 02:26:52,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,495 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,495 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 764 flow. Second operand 5 states and 230 transitions. [2023-11-29 02:26:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 161 transitions, 1255 flow [2023-11-29 02:26:52,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1100 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-11-29 02:26:52,501 INFO L231 Difference]: Finished difference. Result has 118 places, 128 transitions, 699 flow [2023-11-29 02:26:52,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=699, PETRI_PLACES=118, PETRI_TRANSITIONS=128} [2023-11-29 02:26:52,501 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 30 predicate places. [2023-11-29 02:26:52,501 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 128 transitions, 699 flow [2023-11-29 02:26:52,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:52,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:26:52,502 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:52,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash -540590008, now seen corresponding path program 1 times [2023-11-29 02:26:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:52,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854225154] [2023-11-29 02:26:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:52,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:52,926 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 02:26:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854225154] [2023-11-29 02:26:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854225154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083010595] [2023-11-29 02:26:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:52,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:52,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:26:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:53,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:26:53,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:53,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:26:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:26:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:26:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:26:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,342 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 23 treesize of output 1 [2023-11-29 02:26:53,408 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:26:53,409 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 11 treesize of output 11 [2023-11-29 02:26:53,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:26:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:53,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:54,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:26:54,369 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-11-29 02:26:54,383 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:26:54,383 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 66 treesize of output 53 [2023-11-29 02:26:54,394 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 02:26:54,394 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 40 treesize of output 28 [2023-11-29 02:26:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:54,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083010595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:54,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:54,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-11-29 02:26:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100706304] [2023-11-29 02:26:54,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:26:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:26:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=493, Unknown=5, NotChecked=0, Total=600 [2023-11-29 02:26:54,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 91 [2023-11-29 02:26:54,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 128 transitions, 699 flow. Second operand has 25 states, 25 states have (on average 19.16) internal successors, (479), 25 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:54,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 91 [2023-11-29 02:26:54,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:58,572 INFO L124 PetriNetUnfolderBase]: 13331/23514 cut-off events. [2023-11-29 02:26:58,572 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2023-11-29 02:26:58,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50418 conditions, 23514 events. 13331/23514 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 185275 event pairs, 4472 based on Foata normal form. 240/18056 useless extension candidates. Maximal degree in co-relation 50393. Up to 6277 conditions per place. [2023-11-29 02:26:58,721 INFO L140 encePairwiseOnDemand]: 73/91 looper letters, 288 selfloop transitions, 88 changer transitions 1/391 dead transitions. [2023-11-29 02:26:58,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 391 transitions, 2415 flow [2023-11-29 02:26:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:26:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 02:26:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 790 transitions. [2023-11-29 02:26:58,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31004709576138145 [2023-11-29 02:26:58,725 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 790 transitions. [2023-11-29 02:26:58,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 790 transitions. [2023-11-29 02:26:58,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:58,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 790 transitions. [2023-11-29 02:26:58,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 28.214285714285715) internal successors, (790), 28 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 91.0) internal successors, (2639), 29 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,732 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 91.0) internal successors, (2639), 29 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,732 INFO L175 Difference]: Start difference. First operand has 118 places, 128 transitions, 699 flow. Second operand 28 states and 790 transitions. [2023-11-29 02:26:58,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 391 transitions, 2415 flow [2023-11-29 02:26:58,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 391 transitions, 2400 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:58,743 INFO L231 Difference]: Finished difference. Result has 154 places, 185 transitions, 1443 flow [2023-11-29 02:26:58,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1443, PETRI_PLACES=154, PETRI_TRANSITIONS=185} [2023-11-29 02:26:58,743 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 66 predicate places. [2023-11-29 02:26:58,743 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 185 transitions, 1443 flow [2023-11-29 02:26:58,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 19.16) internal successors, (479), 25 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:58,744 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1] [2023-11-29 02:26:58,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:26:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:58,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:26:58,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -774467281, now seen corresponding path program 1 times [2023-11-29 02:26:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:58,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709685569] [2023-11-29 02:26:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709685569] [2023-11-29 02:26:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709685569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138518183] [2023-11-29 02:26:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:59,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:59,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:59,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:26:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:59,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:26:59,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:59,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:59,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138518183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:59,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:59,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-11-29 02:26:59,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720557234] [2023-11-29 02:26:59,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:59,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:26:59,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:26:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:26:59,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2023-11-29 02:26:59,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 185 transitions, 1443 flow. Second operand has 28 states, 28 states have (on average 26.071428571428573) internal successors, (730), 28 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:59,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2023-11-29 02:26:59,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:01,635 INFO L124 PetriNetUnfolderBase]: 8069/14262 cut-off events. [2023-11-29 02:27:01,635 INFO L125 PetriNetUnfolderBase]: For 18073/18105 co-relation queries the response was YES. [2023-11-29 02:27:01,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 14262 events. 8069/14262 cut-off events. For 18073/18105 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 105151 event pairs, 6593 based on Foata normal form. 63/12095 useless extension candidates. Maximal degree in co-relation 38224. Up to 11886 conditions per place. [2023-11-29 02:27:01,743 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 72 selfloop transitions, 203 changer transitions 0/297 dead transitions. [2023-11-29 02:27:01,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 297 transitions, 3218 flow [2023-11-29 02:27:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:27:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:27:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 820 transitions. [2023-11-29 02:27:01,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34657650042265425 [2023-11-29 02:27:01,747 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 820 transitions. [2023-11-29 02:27:01,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 820 transitions. [2023-11-29 02:27:01,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:01,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 820 transitions. [2023-11-29 02:27:01,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 31.53846153846154) internal successors, (820), 26 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 91.0) internal successors, (2457), 27 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,755 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 91.0) internal successors, (2457), 27 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,756 INFO L175 Difference]: Start difference. First operand has 154 places, 185 transitions, 1443 flow. Second operand 26 states and 820 transitions. [2023-11-29 02:27:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 297 transitions, 3218 flow [2023-11-29 02:27:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 297 transitions, 3069 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-29 02:27:01,814 INFO L231 Difference]: Finished difference. Result has 180 places, 297 transitions, 3047 flow [2023-11-29 02:27:01,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3047, PETRI_PLACES=180, PETRI_TRANSITIONS=297} [2023-11-29 02:27:01,815 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 92 predicate places. [2023-11-29 02:27:01,815 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 297 transitions, 3047 flow [2023-11-29 02:27:01,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 26.071428571428573) internal successors, (730), 28 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:01,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:02,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:02,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash -540590005, now seen corresponding path program 1 times [2023-11-29 02:27:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:02,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444434197] [2023-11-29 02:27:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:02,209 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 02:27:02,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:02,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444434197] [2023-11-29 02:27:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444434197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831314637] [2023-11-29 02:27:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:02,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:02,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:27:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:02,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:27:02,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:02,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831314637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:02,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:27:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-29 02:27:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394324402] [2023-11-29 02:27:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:27:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:27:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:27:02,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:27:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 297 transitions, 3047 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:02,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:27:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:03,793 INFO L124 PetriNetUnfolderBase]: 6022/11007 cut-off events. [2023-11-29 02:27:03,793 INFO L125 PetriNetUnfolderBase]: For 15683/15711 co-relation queries the response was YES. [2023-11-29 02:27:03,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29211 conditions, 11007 events. 6022/11007 cut-off events. For 15683/15711 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 80498 event pairs, 4774 based on Foata normal form. 516/10059 useless extension candidates. Maximal degree in co-relation 29168. Up to 9192 conditions per place. [2023-11-29 02:27:03,883 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 269 selfloop transitions, 1 changer transitions 0/294 dead transitions. [2023-11-29 02:27:03,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3569 flow [2023-11-29 02:27:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:27:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:27:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 02:27:03,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091575091575091 [2023-11-29 02:27:03,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 02:27:03,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 02:27:03,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:03,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 02:27:03,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 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 02:27:03,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:27:03,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:27:03,886 INFO L175 Difference]: Start difference. First operand has 180 places, 297 transitions, 3047 flow. Second operand 3 states and 139 transitions. [2023-11-29 02:27:03,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3569 flow [2023-11-29 02:27:03,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 294 transitions, 2948 flow, removed 184 selfloop flow, removed 12 redundant places. [2023-11-29 02:27:03,925 INFO L231 Difference]: Finished difference. Result has 168 places, 294 transitions, 2410 flow [2023-11-29 02:27:03,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2410, PETRI_PLACES=168, PETRI_TRANSITIONS=294} [2023-11-29 02:27:03,926 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 80 predicate places. [2023-11-29 02:27:03,926 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 294 transitions, 2410 flow [2023-11-29 02:27:03,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:03,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:03,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:27:04,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:04,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1370042757, now seen corresponding path program 1 times [2023-11-29 02:27:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34392274] [2023-11-29 02:27:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34392274] [2023-11-29 02:27:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34392274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110344116] [2023-11-29 02:27:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:04,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:04,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:04,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:27:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:04,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:27:04,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:04,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:04,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110344116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:04,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:27:04,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-29 02:27:04,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837535457] [2023-11-29 02:27:04,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:04,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:27:04,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:27:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:27:04,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:27:04,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 294 transitions, 2410 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:04,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:04,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:27:04,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:06,431 INFO L124 PetriNetUnfolderBase]: 7022/12631 cut-off events. [2023-11-29 02:27:06,431 INFO L125 PetriNetUnfolderBase]: For 12309/12313 co-relation queries the response was YES. [2023-11-29 02:27:06,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31999 conditions, 12631 events. 7022/12631 cut-off events. For 12309/12313 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 91442 event pairs, 3248 based on Foata normal form. 198/11185 useless extension candidates. Maximal degree in co-relation 31957. Up to 6095 conditions per place. [2023-11-29 02:27:06,537 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 307 selfloop transitions, 9 changer transitions 0/338 dead transitions. [2023-11-29 02:27:06,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 338 transitions, 3175 flow [2023-11-29 02:27:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:27:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:27:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2023-11-29 02:27:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-11-29 02:27:06,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 238 transitions. [2023-11-29 02:27:06,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 238 transitions. [2023-11-29 02:27:06,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:06,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 238 transitions. [2023-11-29 02:27:06,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:06,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:06,541 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:06,541 INFO L175 Difference]: Start difference. First operand has 168 places, 294 transitions, 2410 flow. Second operand 5 states and 238 transitions. [2023-11-29 02:27:06,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 338 transitions, 3175 flow [2023-11-29 02:27:06,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 338 transitions, 3174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:06,588 INFO L231 Difference]: Finished difference. Result has 174 places, 296 transitions, 2465 flow [2023-11-29 02:27:06,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2465, PETRI_PLACES=174, PETRI_TRANSITIONS=296} [2023-11-29 02:27:06,589 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 86 predicate places. [2023-11-29 02:27:06,589 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 296 transitions, 2465 flow [2023-11-29 02:27:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:06,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:06,589 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] [2023-11-29 02:27:06,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:27:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:27:06,790 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:06,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash 598401424, now seen corresponding path program 1 times [2023-11-29 02:27:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024958024] [2023-11-29 02:27:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:06,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024958024] [2023-11-29 02:27:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024958024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344845288] [2023-11-29 02:27:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:06,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:27:06,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:27:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:27:06,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 91 [2023-11-29 02:27:06,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 296 transitions, 2465 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 02:27:06,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:06,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 91 [2023-11-29 02:27:06,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:09,252 INFO L124 PetriNetUnfolderBase]: 10441/17667 cut-off events. [2023-11-29 02:27:09,252 INFO L125 PetriNetUnfolderBase]: For 15377/15412 co-relation queries the response was YES. [2023-11-29 02:27:09,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43897 conditions, 17667 events. 10441/17667 cut-off events. For 15377/15412 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 128233 event pairs, 3974 based on Foata normal form. 528/15226 useless extension candidates. Maximal degree in co-relation 43851. Up to 11788 conditions per place. [2023-11-29 02:27:09,376 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 309 selfloop transitions, 4 changer transitions 0/335 dead transitions. [2023-11-29 02:27:09,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 335 transitions, 3241 flow [2023-11-29 02:27:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:27:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:27:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2023-11-29 02:27:09,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2023-11-29 02:27:09,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 197 transitions. [2023-11-29 02:27:09,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 197 transitions. [2023-11-29 02:27:09,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:09,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 197 transitions. [2023-11-29 02:27:09,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,380 INFO L175 Difference]: Start difference. First operand has 174 places, 296 transitions, 2465 flow. Second operand 4 states and 197 transitions. [2023-11-29 02:27:09,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 335 transitions, 3241 flow [2023-11-29 02:27:09,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 335 transitions, 3228 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:09,435 INFO L231 Difference]: Finished difference. Result has 177 places, 297 transitions, 2473 flow [2023-11-29 02:27:09,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2473, PETRI_PLACES=177, PETRI_TRANSITIONS=297} [2023-11-29 02:27:09,436 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 89 predicate places. [2023-11-29 02:27:09,436 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 297 transitions, 2473 flow [2023-11-29 02:27:09,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 02:27:09,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:09,436 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] [2023-11-29 02:27:09,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 02:27:09,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:09,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:09,437 INFO L85 PathProgramCache]: Analyzing trace with hash 184084461, now seen corresponding path program 1 times [2023-11-29 02:27:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:09,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691445809] [2023-11-29 02:27:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:09,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:09,970 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 02:27:09,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:09,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691445809] [2023-11-29 02:27:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691445809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:09,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947660342] [2023-11-29 02:27:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:09,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:09,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:09,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:09,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:27:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:10,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:27:10,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:10,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 02:27:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:27:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:27:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:27:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:27:10,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:27:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:27:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:27:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:27:10,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:27:10,305 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 23 treesize of output 1 [2023-11-29 02:27:10,399 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:27:10,399 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 11 treesize of output 11 [2023-11-29 02:27:10,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 02:27:10,589 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:27:10,589 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 10 [2023-11-29 02:27:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:10,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:10,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:27:10,989 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-11-29 02:27:10,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:27:10,999 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 41 treesize of output 33 [2023-11-29 02:27:11,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 02:27:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:11,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947660342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:27:11,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:27:11,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 23 [2023-11-29 02:27:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497366178] [2023-11-29 02:27:11,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:27:11,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:27:11,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:11,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:27:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=526, Unknown=2, NotChecked=0, Total=600 [2023-11-29 02:27:11,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 91 [2023-11-29 02:27:11,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 297 transitions, 2473 flow. Second operand has 25 states, 25 states have (on average 22.16) internal successors, (554), 25 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:11,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:11,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 91 [2023-11-29 02:27:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:24,539 INFO L124 PetriNetUnfolderBase]: 18975/32892 cut-off events. [2023-11-29 02:27:24,539 INFO L125 PetriNetUnfolderBase]: For 34590/34867 co-relation queries the response was YES. [2023-11-29 02:27:24,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83658 conditions, 32892 events. 18975/32892 cut-off events. For 34590/34867 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 265325 event pairs, 7316 based on Foata normal form. 1186/29801 useless extension candidates. Maximal degree in co-relation 83611. Up to 7491 conditions per place. [2023-11-29 02:27:24,857 INFO L140 encePairwiseOnDemand]: 73/91 looper letters, 491 selfloop transitions, 325 changer transitions 14/847 dead transitions. [2023-11-29 02:27:24,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 847 transitions, 6960 flow [2023-11-29 02:27:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:27:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 02:27:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1470 transitions. [2023-11-29 02:27:24,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2023-11-29 02:27:24,863 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1470 transitions. [2023-11-29 02:27:24,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1470 transitions. [2023-11-29 02:27:24,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:24,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1470 transitions. [2023-11-29 02:27:24,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 30.625) internal successors, (1470), 48 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:24,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 91.0) internal successors, (4459), 49 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:24,874 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 91.0) internal successors, (4459), 49 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:24,874 INFO L175 Difference]: Start difference. First operand has 177 places, 297 transitions, 2473 flow. Second operand 48 states and 1470 transitions. [2023-11-29 02:27:24,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 847 transitions, 6960 flow [2023-11-29 02:27:25,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 847 transitions, 6939 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 02:27:25,024 INFO L231 Difference]: Finished difference. Result has 232 places, 447 transitions, 4660 flow [2023-11-29 02:27:25,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4660, PETRI_PLACES=232, PETRI_TRANSITIONS=447} [2023-11-29 02:27:25,025 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 144 predicate places. [2023-11-29 02:27:25,025 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 447 transitions, 4660 flow [2023-11-29 02:27:25,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 22.16) internal successors, (554), 25 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:25,026 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] [2023-11-29 02:27:25,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:27:25,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:27:25,226 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:25,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1631431779, now seen corresponding path program 1 times [2023-11-29 02:27:25,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677772798] [2023-11-29 02:27:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:25,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:27:26,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:26,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677772798] [2023-11-29 02:27:26,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677772798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:26,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741370962] [2023-11-29 02:27:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:26,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:26,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:26,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:27:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:26,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:27:26,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:26,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:26,495 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:27:26,495 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 24 treesize of output 11 [2023-11-29 02:27:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:27:26,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741370962] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:26,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:27:26,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 18 [2023-11-29 02:27:26,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050056801] [2023-11-29 02:27:26,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:27:26,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:26,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:27:26,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:27:26,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 91 [2023-11-29 02:27:26,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 447 transitions, 4660 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:26,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:26,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 91 [2023-11-29 02:27:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:30,409 INFO L124 PetriNetUnfolderBase]: 12141/22308 cut-off events. [2023-11-29 02:27:30,409 INFO L125 PetriNetUnfolderBase]: For 37380/37972 co-relation queries the response was YES. [2023-11-29 02:27:30,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63800 conditions, 22308 events. 12141/22308 cut-off events. For 37380/37972 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 181828 event pairs, 4698 based on Foata normal form. 12/19363 useless extension candidates. Maximal degree in co-relation 63742. Up to 13310 conditions per place. [2023-11-29 02:27:30,618 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 438 selfloop transitions, 20 changer transitions 0/486 dead transitions. [2023-11-29 02:27:30,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 486 transitions, 5687 flow [2023-11-29 02:27:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:27:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:27:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-29 02:27:30,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186813186813187 [2023-11-29 02:27:30,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-29 02:27:30,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-29 02:27:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:30,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-29 02:27:30,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:30,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:30,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:30,621 INFO L175 Difference]: Start difference. First operand has 232 places, 447 transitions, 4660 flow. Second operand 5 states and 236 transitions. [2023-11-29 02:27:30,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 486 transitions, 5687 flow [2023-11-29 02:27:30,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 486 transitions, 5397 flow, removed 122 selfloop flow, removed 12 redundant places. [2023-11-29 02:27:30,767 INFO L231 Difference]: Finished difference. Result has 223 places, 445 transitions, 4381 flow [2023-11-29 02:27:30,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4381, PETRI_PLACES=223, PETRI_TRANSITIONS=445} [2023-11-29 02:27:30,768 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 135 predicate places. [2023-11-29 02:27:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 445 transitions, 4381 flow [2023-11-29 02:27:30,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:30,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:30,769 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] [2023-11-29 02:27:30,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:27:30,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:27:30,969 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:30,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1523213235, now seen corresponding path program 1 times [2023-11-29 02:27:30,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:30,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436911395] [2023-11-29 02:27:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:30,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:31,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:31,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436911395] [2023-11-29 02:27:31,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436911395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:31,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:31,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668720405] [2023-11-29 02:27:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:31,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:27:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:27:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:27:31,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:27:31,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 445 transitions, 4381 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:31,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:31,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:27:31,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:35,323 INFO L124 PetriNetUnfolderBase]: 12639/24142 cut-off events. [2023-11-29 02:27:35,323 INFO L125 PetriNetUnfolderBase]: For 51650/51800 co-relation queries the response was YES. [2023-11-29 02:27:35,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69759 conditions, 24142 events. 12639/24142 cut-off events. For 51650/51800 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 207046 event pairs, 10205 based on Foata normal form. 192/21396 useless extension candidates. Maximal degree in co-relation 69702. Up to 17315 conditions per place. [2023-11-29 02:27:35,569 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 381 selfloop transitions, 62 changer transitions 17/490 dead transitions. [2023-11-29 02:27:35,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 490 transitions, 5613 flow [2023-11-29 02:27:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:27:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:27:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2023-11-29 02:27:35,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2023-11-29 02:27:35,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 199 transitions. [2023-11-29 02:27:35,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 199 transitions. [2023-11-29 02:27:35,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:35,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 199 transitions. [2023-11-29 02:27:35,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 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 02:27:35,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:35,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:35,573 INFO L175 Difference]: Start difference. First operand has 223 places, 445 transitions, 4381 flow. Second operand 4 states and 199 transitions. [2023-11-29 02:27:35,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 490 transitions, 5613 flow [2023-11-29 02:27:35,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 490 transitions, 5576 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 02:27:35,850 INFO L231 Difference]: Finished difference. Result has 225 places, 444 transitions, 4483 flow [2023-11-29 02:27:35,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4483, PETRI_PLACES=225, PETRI_TRANSITIONS=444} [2023-11-29 02:27:35,851 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 137 predicate places. [2023-11-29 02:27:35,851 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 444 transitions, 4483 flow [2023-11-29 02:27:35,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:35,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:35,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:35,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 02:27:35,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:35,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2022689197, now seen corresponding path program 2 times [2023-11-29 02:27:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:35,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440038496] [2023-11-29 02:27:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:37,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440038496] [2023-11-29 02:27:37,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440038496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937103218] [2023-11-29 02:27:37,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:27:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:37,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:37,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:27:37,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:27:37,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:37,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:27:37,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:27:37,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937103218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:27:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 18 [2023-11-29 02:27:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028917708] [2023-11-29 02:27:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:27:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:27:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:27:37,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:27:37,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 444 transitions, 4483 flow. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:37,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:37,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:27:37,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:42,694 INFO L124 PetriNetUnfolderBase]: 15371/28496 cut-off events. [2023-11-29 02:27:42,694 INFO L125 PetriNetUnfolderBase]: For 70870/71266 co-relation queries the response was YES. [2023-11-29 02:27:42,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85775 conditions, 28496 events. 15371/28496 cut-off events. For 70870/71266 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 242920 event pairs, 8636 based on Foata normal form. 148/24903 useless extension candidates. Maximal degree in co-relation 85718. Up to 20132 conditions per place. [2023-11-29 02:27:42,991 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 446 selfloop transitions, 20 changer transitions 0/493 dead transitions. [2023-11-29 02:27:42,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 493 transitions, 5607 flow [2023-11-29 02:27:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:27:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:27:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 267 transitions. [2023-11-29 02:27:42,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2023-11-29 02:27:42,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 267 transitions. [2023-11-29 02:27:42,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 267 transitions. [2023-11-29 02:27:42,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:42,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 267 transitions. [2023-11-29 02:27:42,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 44.5) internal successors, (267), 6 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:42,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:42,994 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:42,994 INFO L175 Difference]: Start difference. First operand has 225 places, 444 transitions, 4483 flow. Second operand 6 states and 267 transitions. [2023-11-29 02:27:42,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 493 transitions, 5607 flow [2023-11-29 02:27:43,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 493 transitions, 5546 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:43,348 INFO L231 Difference]: Finished difference. Result has 231 places, 450 transitions, 4534 flow [2023-11-29 02:27:43,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4534, PETRI_PLACES=231, PETRI_TRANSITIONS=450} [2023-11-29 02:27:43,349 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 143 predicate places. [2023-11-29 02:27:43,349 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 450 transitions, 4534 flow [2023-11-29 02:27:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:43,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:43,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:27:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:43,550 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:43,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 241705197, now seen corresponding path program 3 times [2023-11-29 02:27:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904209319] [2023-11-29 02:27:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:43,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:27:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904209319] [2023-11-29 02:27:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904209319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228566612] [2023-11-29 02:27:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:27:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:44,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:44,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:27:44,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 02:27:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:44,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:27:44,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:27:45,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228566612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:45,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:27:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-11-29 02:27:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508368400] [2023-11-29 02:27:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:45,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:27:45,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:27:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:27:45,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:27:45,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 450 transitions, 4534 flow. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:45,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:45,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:27:45,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:50,720 INFO L124 PetriNetUnfolderBase]: 17621/32870 cut-off events. [2023-11-29 02:27:50,720 INFO L125 PetriNetUnfolderBase]: For 93446/93881 co-relation queries the response was YES. [2023-11-29 02:27:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99774 conditions, 32870 events. 17621/32870 cut-off events. For 93446/93881 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 287512 event pairs, 8324 based on Foata normal form. 501/29087 useless extension candidates. Maximal degree in co-relation 99714. Up to 20157 conditions per place. [2023-11-29 02:27:51,094 INFO L140 encePairwiseOnDemand]: 84/91 looper letters, 490 selfloop transitions, 35 changer transitions 0/552 dead transitions. [2023-11-29 02:27:51,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 552 transitions, 6026 flow [2023-11-29 02:27:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:27:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:27:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 373 transitions. [2023-11-29 02:27:51,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123626373626373 [2023-11-29 02:27:51,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 373 transitions. [2023-11-29 02:27:51,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 373 transitions. [2023-11-29 02:27:51,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:51,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 373 transitions. [2023-11-29 02:27:51,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 46.625) internal successors, (373), 8 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:51,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:51,098 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:51,098 INFO L175 Difference]: Start difference. First operand has 231 places, 450 transitions, 4534 flow. Second operand 8 states and 373 transitions. [2023-11-29 02:27:51,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 552 transitions, 6026 flow [2023-11-29 02:27:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 552 transitions, 5964 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-29 02:27:51,629 INFO L231 Difference]: Finished difference. Result has 236 places, 474 transitions, 4810 flow [2023-11-29 02:27:51,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4810, PETRI_PLACES=236, PETRI_TRANSITIONS=474} [2023-11-29 02:27:51,630 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2023-11-29 02:27:51,630 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 474 transitions, 4810 flow [2023-11-29 02:27:51,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:51,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:51,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:51,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:27:51,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:51,831 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:27:51,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash -512453793, now seen corresponding path program 1 times [2023-11-29 02:27:51,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:51,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617050983] [2023-11-29 02:27:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617050983] [2023-11-29 02:27:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617050983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140020823] [2023-11-29 02:27:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:53,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:53,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:27:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:53,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:27:53,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:27:53,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:53,612 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:27:53,612 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 24 treesize of output 11 [2023-11-29 02:27:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:27:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140020823] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:27:53,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:27:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 9] total 25 [2023-11-29 02:27:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474421383] [2023-11-29 02:27:53,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:53,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:27:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:27:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:27:53,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:27:53,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 474 transitions, 4810 flow. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 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 02:27:53,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:53,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:27:53,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:59,344 INFO L124 PetriNetUnfolderBase]: 18130/33385 cut-off events. [2023-11-29 02:27:59,344 INFO L125 PetriNetUnfolderBase]: For 96109/96179 co-relation queries the response was YES. [2023-11-29 02:27:59,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107300 conditions, 33385 events. 18130/33385 cut-off events. For 96109/96179 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 288461 event pairs, 4450 based on Foata normal form. 104/29663 useless extension candidates. Maximal degree in co-relation 107239. Up to 20477 conditions per place. [2023-11-29 02:27:59,769 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 463 selfloop transitions, 40 changer transitions 0/526 dead transitions. [2023-11-29 02:27:59,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 526 transitions, 6039 flow [2023-11-29 02:27:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:27:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:27:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 270 transitions. [2023-11-29 02:27:59,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2023-11-29 02:27:59,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 270 transitions. [2023-11-29 02:27:59,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 270 transitions. [2023-11-29 02:27:59,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:59,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 270 transitions. [2023-11-29 02:27:59,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:59,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:59,774 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:59,774 INFO L175 Difference]: Start difference. First operand has 236 places, 474 transitions, 4810 flow. Second operand 6 states and 270 transitions. [2023-11-29 02:27:59,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 526 transitions, 6039 flow [2023-11-29 02:28:00,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 526 transitions, 5997 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-29 02:28:00,586 INFO L231 Difference]: Finished difference. Result has 242 places, 480 transitions, 4938 flow [2023-11-29 02:28:00,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4768, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4938, PETRI_PLACES=242, PETRI_TRANSITIONS=480} [2023-11-29 02:28:00,586 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 154 predicate places. [2023-11-29 02:28:00,586 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 480 transitions, 4938 flow [2023-11-29 02:28:00,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 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 02:28:00,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:00,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:28:00,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 02:28:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:00,788 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:28:00,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1844107971, now seen corresponding path program 2 times [2023-11-29 02:28:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958613769] [2023-11-29 02:28:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:28:01,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:01,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958613769] [2023-11-29 02:28:01,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958613769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:28:01,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743041478] [2023-11-29 02:28:01,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:28:01,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:01,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:01,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:01,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:28:02,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:28:02,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:28:02,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:28:02,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:28:02,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:28:02,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743041478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:28:02,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:28:02,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 18 [2023-11-29 02:28:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947505380] [2023-11-29 02:28:02,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:28:02,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:28:02,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:28:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:28:02,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 91 [2023-11-29 02:28:02,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 480 transitions, 4938 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:02,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:02,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 91 [2023-11-29 02:28:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:08,975 INFO L124 PetriNetUnfolderBase]: 22400/41577 cut-off events. [2023-11-29 02:28:08,975 INFO L125 PetriNetUnfolderBase]: For 116280/116404 co-relation queries the response was YES. [2023-11-29 02:28:09,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127887 conditions, 41577 events. 22400/41577 cut-off events. For 116280/116404 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 374415 event pairs, 12164 based on Foata normal form. 104/36017 useless extension candidates. Maximal degree in co-relation 127823. Up to 28419 conditions per place. [2023-11-29 02:28:09,475 INFO L140 encePairwiseOnDemand]: 85/91 looper letters, 478 selfloop transitions, 15 changer transitions 1/520 dead transitions. [2023-11-29 02:28:09,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 520 transitions, 6044 flow [2023-11-29 02:28:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:28:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:28:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 262 transitions. [2023-11-29 02:28:09,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985347985347987 [2023-11-29 02:28:09,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 262 transitions. [2023-11-29 02:28:09,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 262 transitions. [2023-11-29 02:28:09,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:28:09,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 262 transitions. [2023-11-29 02:28:09,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:09,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:09,478 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:09,478 INFO L175 Difference]: Start difference. First operand has 242 places, 480 transitions, 4938 flow. Second operand 6 states and 262 transitions. [2023-11-29 02:28:09,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 520 transitions, 6044 flow [2023-11-29 02:28:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 520 transitions, 6025 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 02:28:10,361 INFO L231 Difference]: Finished difference. Result has 247 places, 480 transitions, 4954 flow [2023-11-29 02:28:10,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4954, PETRI_PLACES=247, PETRI_TRANSITIONS=480} [2023-11-29 02:28:10,362 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 159 predicate places. [2023-11-29 02:28:10,362 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 480 transitions, 4954 flow [2023-11-29 02:28:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:10,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:10,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:28:10,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 02:28:10,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:28:10,563 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:28:10,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1264038202, now seen corresponding path program 1 times [2023-11-29 02:28:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:10,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860013855] [2023-11-29 02:28:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:28:10,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:10,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860013855] [2023-11-29 02:28:10,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860013855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:28:10,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:28:10,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:28:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72055812] [2023-11-29 02:28:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:28:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:28:10,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:28:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:28:10,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:28:10,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 480 transitions, 4954 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 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 02:28:10,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:10,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:28:10,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:19,625 INFO L124 PetriNetUnfolderBase]: 28042/52547 cut-off events. [2023-11-29 02:28:19,626 INFO L125 PetriNetUnfolderBase]: For 145894/146440 co-relation queries the response was YES. [2023-11-29 02:28:20,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165583 conditions, 52547 events. 28042/52547 cut-off events. For 145894/146440 co-relation queries the response was YES. Maximal size of possible extension queue 1452. Compared 495163 event pairs, 9482 based on Foata normal form. 296/45959 useless extension candidates. Maximal degree in co-relation 165517. Up to 16949 conditions per place. [2023-11-29 02:28:20,487 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 484 selfloop transitions, 46 changer transitions 1/561 dead transitions. [2023-11-29 02:28:20,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 561 transitions, 6480 flow [2023-11-29 02:28:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:28:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:28:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 226 transitions. [2023-11-29 02:28:20,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208791208791209 [2023-11-29 02:28:20,489 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 226 transitions. [2023-11-29 02:28:20,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 226 transitions. [2023-11-29 02:28:20,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:28:20,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 226 transitions. [2023-11-29 02:28:20,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:20,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:20,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:20,491 INFO L175 Difference]: Start difference. First operand has 247 places, 480 transitions, 4954 flow. Second operand 4 states and 226 transitions. [2023-11-29 02:28:20,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 561 transitions, 6480 flow [2023-11-29 02:28:21,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 561 transitions, 6457 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:28:21,602 INFO L231 Difference]: Finished difference. Result has 249 places, 491 transitions, 5245 flow [2023-11-29 02:28:21,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5245, PETRI_PLACES=249, PETRI_TRANSITIONS=491} [2023-11-29 02:28:21,603 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 161 predicate places. [2023-11-29 02:28:21,603 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 491 transitions, 5245 flow [2023-11-29 02:28:21,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 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 02:28:21,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:21,603 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, 1] [2023-11-29 02:28:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 02:28:21,604 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:28:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1303407031, now seen corresponding path program 1 times [2023-11-29 02:28:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972641374] [2023-11-29 02:28:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:28:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:21,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972641374] [2023-11-29 02:28:21,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972641374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:28:21,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783164187] [2023-11-29 02:28:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:21,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:21,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:21,820 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:21,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:28:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:22,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:28:22,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:28:22,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:28:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783164187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:28:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:28:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-29 02:28:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119999703] [2023-11-29 02:28:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:28:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:28:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:28:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:28:22,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 91 [2023-11-29 02:28:22,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 491 transitions, 5245 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:22,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:22,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 91 [2023-11-29 02:28:22,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:29,594 INFO L124 PetriNetUnfolderBase]: 21026/40193 cut-off events. [2023-11-29 02:28:29,594 INFO L125 PetriNetUnfolderBase]: For 138330/138654 co-relation queries the response was YES. [2023-11-29 02:28:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133111 conditions, 40193 events. 21026/40193 cut-off events. For 138330/138654 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 373303 event pairs, 16752 based on Foata normal form. 0/36873 useless extension candidates. Maximal degree in co-relation 133043. Up to 30925 conditions per place. [2023-11-29 02:28:30,100 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 458 selfloop transitions, 1 changer transitions 0/489 dead transitions. [2023-11-29 02:28:30,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 489 transitions, 6155 flow [2023-11-29 02:28:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:28:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:28:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-29 02:28:30,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2023-11-29 02:28:30,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-29 02:28:30,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-29 02:28:30,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:28:30,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-29 02:28:30,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:30,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:28:30,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 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 02:28:30,103 INFO L175 Difference]: Start difference. First operand has 249 places, 491 transitions, 5245 flow. Second operand 3 states and 137 transitions. [2023-11-29 02:28:30,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 489 transitions, 6155 flow [2023-11-29 02:28:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 489 transitions, 6131 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-29 02:28:31,025 INFO L231 Difference]: Finished difference. Result has 247 places, 489 transitions, 5215 flow [2023-11-29 02:28:31,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5215, PETRI_PLACES=247, PETRI_TRANSITIONS=489} [2023-11-29 02:28:31,026 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 159 predicate places. [2023-11-29 02:28:31,026 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 489 transitions, 5215 flow [2023-11-29 02:28:31,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:31,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:31,026 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, 1] [2023-11-29 02:28:31,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:28:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:28:31,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:28:31,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1686066110, now seen corresponding path program 1 times [2023-11-29 02:28:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757721477] [2023-11-29 02:28:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:32,286 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 02:28:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757721477] [2023-11-29 02:28:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757721477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:28:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500523510] [2023-11-29 02:28:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:32,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:32,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:32,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:28:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:32,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:28:32,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:32,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:28:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:28:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:28:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:28:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:28:32,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:28:32,620 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 23 treesize of output 1 [2023-11-29 02:28:32,702 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 02:28:32,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 02:28:32,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:28:32,883 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 02:28:32,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 02:28:32,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:28:33,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 02:28:33,419 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 02:28:33,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:36,329 INFO L349 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-11-29 02:28:36,330 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 117 [2023-11-29 02:28:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:28:36,431 INFO L349 Elim1Store]: treesize reduction 70, result has 52.4 percent of original size [2023-11-29 02:28:36,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 158 [2023-11-29 02:28:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:28:36,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 02:28:36,682 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 02:28:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500523510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:36,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:28:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-11-29 02:28:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308256996] [2023-11-29 02:28:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:28:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:28:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1297, Unknown=3, NotChecked=0, Total=1482 [2023-11-29 02:28:37,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 91 [2023-11-29 02:28:37,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 489 transitions, 5215 flow. Second operand has 39 states, 39 states have (on average 13.974358974358974) internal successors, (545), 39 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:28:37,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:37,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 91 [2023-11-29 02:28:37,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:42,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:29:20,549 INFO L124 PetriNetUnfolderBase]: 98310/155932 cut-off events. [2023-11-29 02:29:20,549 INFO L125 PetriNetUnfolderBase]: For 439621/439621 co-relation queries the response was YES. [2023-11-29 02:29:22,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471649 conditions, 155932 events. 98310/155932 cut-off events. For 439621/439621 co-relation queries the response was YES. Maximal size of possible extension queue 2979. Compared 1316045 event pairs, 24693 based on Foata normal form. 0/139415 useless extension candidates. Maximal degree in co-relation 471580. Up to 56754 conditions per place. [2023-11-29 02:29:22,984 INFO L140 encePairwiseOnDemand]: 68/91 looper letters, 716 selfloop transitions, 403 changer transitions 64/1192 dead transitions. [2023-11-29 02:29:22,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1192 transitions, 12922 flow [2023-11-29 02:29:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 02:29:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-29 02:29:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1157 transitions. [2023-11-29 02:29:22,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22704081632653061 [2023-11-29 02:29:22,988 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 1157 transitions. [2023-11-29 02:29:22,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 1157 transitions. [2023-11-29 02:29:22,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:29:22,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 1157 transitions. [2023-11-29 02:29:22,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 20.660714285714285) internal successors, (1157), 56 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:22,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 91.0) internal successors, (5187), 57 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 91.0) internal successors, (5187), 57 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:22,998 INFO L175 Difference]: Start difference. First operand has 247 places, 489 transitions, 5215 flow. Second operand 56 states and 1157 transitions. [2023-11-29 02:29:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1192 transitions, 12922 flow [2023-11-29 02:29:27,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1192 transitions, 12921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:29:27,020 INFO L231 Difference]: Finished difference. Result has 315 places, 619 transitions, 7932 flow [2023-11-29 02:29:27,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=7932, PETRI_PLACES=315, PETRI_TRANSITIONS=619} [2023-11-29 02:29:27,021 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 227 predicate places. [2023-11-29 02:29:27,021 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 619 transitions, 7932 flow [2023-11-29 02:29:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 13.974358974358974) internal successors, (545), 39 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:27,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:29:27,022 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, 1] [2023-11-29 02:29:27,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:29:27,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:29:27,222 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:29:27,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1612606327, now seen corresponding path program 1 times [2023-11-29 02:29:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363957877] [2023-11-29 02:29:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:27,660 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 02:29:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363957877] [2023-11-29 02:29:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363957877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658768050] [2023-11-29 02:29:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:27,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:27,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:27,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:29:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:27,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:29:27,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:28,068 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 24 treesize of output 12 [2023-11-29 02:29:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:29:28,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:29:28,149 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:29:28,149 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 36 treesize of output 15 [2023-11-29 02:29:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:29:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658768050] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:28,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:29:28,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 8] total 18 [2023-11-29 02:29:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970591794] [2023-11-29 02:29:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:29:28,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:29:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:29:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:29:28,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 91 [2023-11-29 02:29:28,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 619 transitions, 7932 flow. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:28,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:29:28,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 91 [2023-11-29 02:29:28,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:29:41,247 INFO L124 PetriNetUnfolderBase]: 33996/61194 cut-off events. [2023-11-29 02:29:41,247 INFO L125 PetriNetUnfolderBase]: For 297233/297951 co-relation queries the response was YES. [2023-11-29 02:29:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235469 conditions, 61194 events. 33996/61194 cut-off events. For 297233/297951 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 559259 event pairs, 10392 based on Foata normal form. 322/59486 useless extension candidates. Maximal degree in co-relation 235385. Up to 31414 conditions per place. [2023-11-29 02:29:42,282 INFO L140 encePairwiseOnDemand]: 85/91 looper letters, 695 selfloop transitions, 21 changer transitions 0/749 dead transitions. [2023-11-29 02:29:42,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 749 transitions, 10815 flow [2023-11-29 02:29:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:29:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:29:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2023-11-29 02:29:42,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2023-11-29 02:29:42,284 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 235 transitions. [2023-11-29 02:29:42,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 235 transitions. [2023-11-29 02:29:42,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:29:42,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 235 transitions. [2023-11-29 02:29:42,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:42,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:42,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:42,286 INFO L175 Difference]: Start difference. First operand has 315 places, 619 transitions, 7932 flow. Second operand 5 states and 235 transitions. [2023-11-29 02:29:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 749 transitions, 10815 flow [2023-11-29 02:29:44,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 749 transitions, 10658 flow, removed 58 selfloop flow, removed 13 redundant places. [2023-11-29 02:29:44,869 INFO L231 Difference]: Finished difference. Result has 304 places, 618 transitions, 7868 flow [2023-11-29 02:29:44,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=7776, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7868, PETRI_PLACES=304, PETRI_TRANSITIONS=618} [2023-11-29 02:29:44,870 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2023-11-29 02:29:44,870 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 618 transitions, 7868 flow [2023-11-29 02:29:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:44,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:29:44,871 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, 1, 1] [2023-11-29 02:29:44,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 02:29:45,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:29:45,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:29:45,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash 728443108, now seen corresponding path program 1 times [2023-11-29 02:29:45,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:45,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354062379] [2023-11-29 02:29:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:45,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:29:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354062379] [2023-11-29 02:29:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354062379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:29:45,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:29:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:29:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158708246] [2023-11-29 02:29:45,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:29:45,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:29:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:29:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:29:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 91 [2023-11-29 02:29:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 618 transitions, 7868 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:29:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:29:45,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 91 [2023-11-29 02:29:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:30:05,066 INFO L124 PetriNetUnfolderBase]: 53422/91011 cut-off events. [2023-11-29 02:30:05,068 INFO L125 PetriNetUnfolderBase]: For 434818/436520 co-relation queries the response was YES. [2023-11-29 02:30:06,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346001 conditions, 91011 events. 53422/91011 cut-off events. For 434818/436520 co-relation queries the response was YES. Maximal size of possible extension queue 2446. Compared 837417 event pairs, 25212 based on Foata normal form. 2226/87557 useless extension candidates. Maximal degree in co-relation 345916. Up to 65195 conditions per place. [2023-11-29 02:30:06,780 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 750 selfloop transitions, 4 changer transitions 0/782 dead transitions. [2023-11-29 02:30:06,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 782 transitions, 11425 flow [2023-11-29 02:30:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:30:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:30:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2023-11-29 02:30:06,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-11-29 02:30:06,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 196 transitions. [2023-11-29 02:30:06,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 196 transitions. [2023-11-29 02:30:06,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:30:06,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 196 transitions. [2023-11-29 02:30:06,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:06,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:06,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:06,784 INFO L175 Difference]: Start difference. First operand has 304 places, 618 transitions, 7868 flow. Second operand 4 states and 196 transitions. [2023-11-29 02:30:06,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 782 transitions, 11425 flow [2023-11-29 02:30:11,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 782 transitions, 11396 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-29 02:30:11,609 INFO L231 Difference]: Finished difference. Result has 307 places, 619 transitions, 7860 flow [2023-11-29 02:30:11,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=7860, PETRI_PLACES=307, PETRI_TRANSITIONS=619} [2023-11-29 02:30:11,610 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 219 predicate places. [2023-11-29 02:30:11,610 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 619 transitions, 7860 flow [2023-11-29 02:30:11,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:11,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:30:11,610 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, 1, 1, 1] [2023-11-29 02:30:11,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 02:30:11,611 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:30:11,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1846512047, now seen corresponding path program 1 times [2023-11-29 02:30:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288731073] [2023-11-29 02:30:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:30:11,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288731073] [2023-11-29 02:30:11,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288731073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543900910] [2023-11-29 02:30:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:11,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:11,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:30:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:12,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:30:12,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:12,362 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 24 treesize of output 12 [2023-11-29 02:30:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:30:12,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:12,492 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:30:12,492 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 36 treesize of output 15 [2023-11-29 02:30:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:30:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543900910] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:12,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:30:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 19 [2023-11-29 02:30:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088775810] [2023-11-29 02:30:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:30:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:30:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:30:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:30:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 619 transitions, 7860 flow. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:30:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:30:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:30:34,197 INFO L124 PetriNetUnfolderBase]: 54451/99054 cut-off events. [2023-11-29 02:30:34,199 INFO L125 PetriNetUnfolderBase]: For 462664/463694 co-relation queries the response was YES. [2023-11-29 02:30:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370332 conditions, 99054 events. 54451/99054 cut-off events. For 462664/463694 co-relation queries the response was YES. Maximal size of possible extension queue 2746. Compared 993079 event pairs, 20326 based on Foata normal form. 2000/98110 useless extension candidates. Maximal degree in co-relation 370246. Up to 62418 conditions per place. [2023-11-29 02:30:35,968 INFO L140 encePairwiseOnDemand]: 79/91 looper letters, 677 selfloop transitions, 114 changer transitions 0/823 dead transitions. [2023-11-29 02:30:35,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 823 transitions, 11787 flow [2023-11-29 02:30:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:30:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:30:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 343 transitions. [2023-11-29 02:30:35,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2023-11-29 02:30:35,970 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 343 transitions. [2023-11-29 02:30:35,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 343 transitions. [2023-11-29 02:30:35,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:30:35,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 343 transitions. [2023-11-29 02:30:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:35,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:35,972 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:35,972 INFO L175 Difference]: Start difference. First operand has 307 places, 619 transitions, 7860 flow. Second operand 8 states and 343 transitions. [2023-11-29 02:30:35,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 823 transitions, 11787 flow [2023-11-29 02:30:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 823 transitions, 11778 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:30:40,797 INFO L231 Difference]: Finished difference. Result has 314 places, 631 transitions, 8236 flow [2023-11-29 02:30:40,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8236, PETRI_PLACES=314, PETRI_TRANSITIONS=631} [2023-11-29 02:30:40,798 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 226 predicate places. [2023-11-29 02:30:40,798 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 631 transitions, 8236 flow [2023-11-29 02:30:40,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:40,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:30:40,798 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, 1, 1, 1] [2023-11-29 02:30:40,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:30:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:30:40,999 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 58 more)] === [2023-11-29 02:30:40,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1106901027, now seen corresponding path program 2 times [2023-11-29 02:30:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:41,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614506653] [2023-11-29 02:30:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:30:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614506653] [2023-11-29 02:30:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614506653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354375686] [2023-11-29 02:30:41,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:41,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:41,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:41,538 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:41,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77b26410-5da3-495a-a848-1e07ad2176d2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:30:41,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:30:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:41,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:30:41,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:41,836 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 36 treesize of output 12 [2023-11-29 02:30:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:30:41,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:30:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354375686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:41,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:30:41,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-11-29 02:30:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824369463] [2023-11-29 02:30:41,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:30:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:30:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:30:41,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2023-11-29 02:30:41,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 631 transitions, 8236 flow. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:41,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:30:41,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2023-11-29 02:30:41,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand