./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.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_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/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_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/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_8700087e-e617-4e93-9486-7080fdfbbf30/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 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:08:13,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:08:13,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 03:08:13,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:08:13,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:08:13,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:08:13,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:08:13,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:08:13,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:08:13,838 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:08:13,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:08:13,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:08:13,840 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:08:13,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:08:13,841 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:08:13,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:08:13,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:08:13,842 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:08:13,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:08:13,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:08:13,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:08:13,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:08:13,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:08:13,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:08:13,845 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 03:08:13,846 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:08:13,846 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:08:13,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:08:13,847 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:08:13,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:08:13,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:08:13,848 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:08:13,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:08:13,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:08:13,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:08:13,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:08:13,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:08:13,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:08:13,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:08:13,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:08:13,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:08:13,850 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:08:13,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:08:13,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:08:13,851 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_8700087e-e617-4e93-9486-7080fdfbbf30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 [2023-11-29 03:08:14,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:08:14,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:08:14,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:08:14,090 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:08:14,090 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:08:14,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2023-11-29 03:08:16,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:08:17,060 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:08:17,061 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2023-11-29 03:08:17,069 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/data/a5e418b36/598676e576bf4178b9abebcc8654606c/FLAGb61cb4f86 [2023-11-29 03:08:17,084 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/data/a5e418b36/598676e576bf4178b9abebcc8654606c [2023-11-29 03:08:17,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:08:17,088 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:08:17,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:08:17,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:08:17,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:08:17,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4887af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17, skipping insertion in model container [2023-11-29 03:08:17,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,125 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:08:17,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:08:17,326 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:08:17,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:08:17,364 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:08:17,364 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:08:17,372 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:08:17,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17 WrapperNode [2023-11-29 03:08:17,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:08:17,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:08:17,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:08:17,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:08:17,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,417 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 149 [2023-11-29 03:08:17,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:08:17,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:08:17,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:08:17,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:08:17,430 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,435 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,453 INFO L175 MemorySlicer]: Split 20 memory accesses to 6 slices as follows [2, 2, 10, 2, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 1, 1, 1]. [2023-11-29 03:08:17,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:08:17,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:08:17,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:08:17,477 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:08:17,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (1/1) ... [2023-11-29 03:08:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:08:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:17,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:08:17,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:08:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:08:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:08:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 03:08:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:08:17,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:08:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:08:17,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:08:17,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:08:17,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:08:17,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 03:08:17,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 03:08:17,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:08:17,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:08:17,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:08:17,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:08:17,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:08:17,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:08:17,542 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:08:17,662 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:08:17,665 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:08:17,983 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:08:18,204 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:08:18,205 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 03:08:18,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:08:18 BoogieIcfgContainer [2023-11-29 03:08:18,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:08:18,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:08:18,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:08:18,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:08:18,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:08:17" (1/3) ... [2023-11-29 03:08:18,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e8977f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:08:18, skipping insertion in model container [2023-11-29 03:08:18,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:08:17" (2/3) ... [2023-11-29 03:08:18,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e8977f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:08:18, skipping insertion in model container [2023-11-29 03:08:18,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:08:18" (3/3) ... [2023-11-29 03:08:18,213 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-11-29 03:08:18,221 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:08:18,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:08:18,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-29 03:08:18,229 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:08:18,293 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 03:08:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 67 transitions, 162 flow [2023-11-29 03:08:18,366 INFO L124 PetriNetUnfolderBase]: 4/63 cut-off events. [2023-11-29 03:08:18,366 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 03:08:18,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 4/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-29 03:08:18,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 67 transitions, 162 flow [2023-11-29 03:08:18,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 61 transitions, 143 flow [2023-11-29 03:08:18,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:08:18,392 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;@607348b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:08:18,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-29 03:08:18,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:08:18,396 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 03:08:18,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:08:18,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:18,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:08:18,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:18,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash 565739, now seen corresponding path program 1 times [2023-11-29 03:08:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:18,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002667295] [2023-11-29 03:08:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:18,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:18,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002667295] [2023-11-29 03:08:18,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002667295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:18,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:18,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:08:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291862241] [2023-11-29 03:08:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:08:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:08:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:08:18,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-29 03:08:18,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:18,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:18,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-29 03:08:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:19,946 INFO L124 PetriNetUnfolderBase]: 5283/7248 cut-off events. [2023-11-29 03:08:19,946 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-11-29 03:08:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14532 conditions, 7248 events. 5283/7248 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41958 event pairs, 3867 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 12550. Up to 6841 conditions per place. [2023-11-29 03:08:20,033 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 35 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-29 03:08:20,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 62 transitions, 223 flow [2023-11-29 03:08:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:08:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:08:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-29 03:08:20,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634328358208955 [2023-11-29 03:08:20,047 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-29 03:08:20,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-29 03:08:20,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:20,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-29 03:08:20,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:20,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:20,059 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:20,060 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 143 flow. Second operand 4 states and 151 transitions. [2023-11-29 03:08:20,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 62 transitions, 223 flow [2023-11-29 03:08:20,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 210 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 03:08:20,072 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 155 flow [2023-11-29 03:08:20,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-29 03:08:20,077 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2023-11-29 03:08:20,078 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 155 flow [2023-11-29 03:08:20,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:20,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:20,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 03:08:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:08:20,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:20,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -325354637, now seen corresponding path program 1 times [2023-11-29 03:08:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:20,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591352750] [2023-11-29 03:08:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:20,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:20,240 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 03:08:20,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591352750] [2023-11-29 03:08:20,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591352750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430851091] [2023-11-29 03:08:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:20,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:20,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:08:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:20,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:08:20,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:20,424 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 03:08:20,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:08:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430851091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:20,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:08:20,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 03:08:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363074928] [2023-11-29 03:08:20,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:08:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:08:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:08:20,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-29 03:08:20,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:20,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:20,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-29 03:08:20,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:21,346 INFO L124 PetriNetUnfolderBase]: 5283/7247 cut-off events. [2023-11-29 03:08:21,346 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 03:08:21,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14385 conditions, 7247 events. 5283/7247 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41955 event pairs, 3867 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 14358. Up to 6836 conditions per place. [2023-11-29 03:08:21,394 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 31 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-29 03:08:21,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 227 flow [2023-11-29 03:08:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:08:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:08:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2023-11-29 03:08:21,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 03:08:21,398 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 201 transitions. [2023-11-29 03:08:21,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 201 transitions. [2023-11-29 03:08:21,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:21,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 201 transitions. [2023-11-29 03:08:21,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:21,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:21,403 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:21,403 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 155 flow. Second operand 6 states and 201 transitions. [2023-11-29 03:08:21,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 227 flow [2023-11-29 03:08:21,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:08:21,405 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 162 flow [2023-11-29 03:08:21,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-11-29 03:08:21,406 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-11-29 03:08:21,407 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 162 flow [2023-11-29 03:08:21,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:21,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:21,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 03:08:21,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 03:08:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:21,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:21,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1496058566, now seen corresponding path program 1 times [2023-11-29 03:08:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096827489] [2023-11-29 03:08:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096827489] [2023-11-29 03:08:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096827489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:21,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321075949] [2023-11-29 03:08:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:21,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:21,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:21,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:21,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:08:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:21,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:08:21,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:21,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:21,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321075949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:21,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:21,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 03:08:21,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418783479] [2023-11-29 03:08:21,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:21,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:08:21,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:08:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:08:21,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-29 03:08:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 162 flow. Second operand has 12 states, 12 states have (on average 28.083333333333332) internal successors, (337), 12 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-29 03:08:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:22,851 INFO L124 PetriNetUnfolderBase]: 5286/7259 cut-off events. [2023-11-29 03:08:22,851 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-29 03:08:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14429 conditions, 7259 events. 5286/7259 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41981 event pairs, 3867 based on Foata normal form. 3/6334 useless extension candidates. Maximal degree in co-relation 14359. Up to 6843 conditions per place. [2023-11-29 03:08:22,885 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 34 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-11-29 03:08:22,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 310 flow [2023-11-29 03:08:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:08:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:08:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 320 transitions. [2023-11-29 03:08:22,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2023-11-29 03:08:22,889 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 320 transitions. [2023-11-29 03:08:22,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 320 transitions. [2023-11-29 03:08:22,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:22,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 320 transitions. [2023-11-29 03:08:22,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:22,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:22,895 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:22,895 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 162 flow. Second operand 10 states and 320 transitions. [2023-11-29 03:08:22,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 310 flow [2023-11-29 03:08:22,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 264 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 03:08:22,898 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 214 flow [2023-11-29 03:08:22,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=214, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-29 03:08:22,899 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-11-29 03:08:22,899 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 214 flow [2023-11-29 03:08:22,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.083333333333332) internal successors, (337), 12 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:22,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:22,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:22,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 03:08:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:23,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 609121900, now seen corresponding path program 1 times [2023-11-29 03:08:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655761249] [2023-11-29 03:08:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655761249] [2023-11-29 03:08:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655761249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:23,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:08:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372319234] [2023-11-29 03:08:23,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:08:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:08:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:08:23,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2023-11-29 03:08:23,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:23,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:23,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2023-11-29 03:08:23,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:23,762 INFO L124 PetriNetUnfolderBase]: 5285/7258 cut-off events. [2023-11-29 03:08:23,762 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 03:08:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14426 conditions, 7258 events. 5285/7258 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42054 event pairs, 3867 based on Foata normal form. 1/6334 useless extension candidates. Maximal degree in co-relation 14392. Up to 6847 conditions per place. [2023-11-29 03:08:23,801 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 43 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-29 03:08:23,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 300 flow [2023-11-29 03:08:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:08:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:08:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-29 03:08:23,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169154228855721 [2023-11-29 03:08:23,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-29 03:08:23,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-29 03:08:23,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:23,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-29 03:08:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:23,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:23,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:23,806 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 214 flow. Second operand 3 states and 124 transitions. [2023-11-29 03:08:23,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 300 flow [2023-11-29 03:08:23,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 69 transitions, 290 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 03:08:23,810 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 204 flow [2023-11-29 03:08:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-29 03:08:23,811 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-11-29 03:08:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 204 flow [2023-11-29 03:08:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:23,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:23,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:08:23,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:23,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1579504612, now seen corresponding path program 1 times [2023-11-29 03:08:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:23,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433932128] [2023-11-29 03:08:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:24,152 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 03:08:24,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:24,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433932128] [2023-11-29 03:08:24,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433932128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:24,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170088240] [2023-11-29 03:08:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:24,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:24,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:08:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:24,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:08:24,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:24,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:08:24,405 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 03:08:24,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:24,471 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 16 treesize of output 14 [2023-11-29 03:08:24,478 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 22 treesize of output 20 [2023-11-29 03:08:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:24,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170088240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:24,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:24,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 03:08:24,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488283622] [2023-11-29 03:08:24,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:24,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:08:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:08:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:08:24,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2023-11-29 03:08:24,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 204 flow. Second operand has 11 states, 11 states have (on average 31.181818181818183) internal successors, (343), 11 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 03:08:24,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:24,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2023-11-29 03:08:24,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:25,762 INFO L124 PetriNetUnfolderBase]: 7647/12698 cut-off events. [2023-11-29 03:08:25,762 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-29 03:08:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22922 conditions, 12698 events. 7647/12698 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 97729 event pairs, 3051 based on Foata normal form. 0/11183 useless extension candidates. Maximal degree in co-relation 22902. Up to 5805 conditions per place. [2023-11-29 03:08:25,907 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 72 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2023-11-29 03:08:25,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 458 flow [2023-11-29 03:08:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:08:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 03:08:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 308 transitions. [2023-11-29 03:08:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746268656716418 [2023-11-29 03:08:25,910 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 308 transitions. [2023-11-29 03:08:25,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 308 transitions. [2023-11-29 03:08:25,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:25,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 308 transitions. [2023-11-29 03:08:25,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.5) internal successors, (308), 8 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:25,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:25,913 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:25,913 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 204 flow. Second operand 8 states and 308 transitions. [2023-11-29 03:08:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 458 flow [2023-11-29 03:08:25,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:08:25,918 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 248 flow [2023-11-29 03:08:25,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2023-11-29 03:08:25,919 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 13 predicate places. [2023-11-29 03:08:25,919 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 248 flow [2023-11-29 03:08:25,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.181818181818183) internal successors, (343), 11 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 03:08:25,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:25,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:25,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:08:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:26,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:26,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1143145537, now seen corresponding path program 1 times [2023-11-29 03:08:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:26,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517451247] [2023-11-29 03:08:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:26,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:26,178 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 03:08:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517451247] [2023-11-29 03:08:26,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517451247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:26,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:26,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:08:26,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972371056] [2023-11-29 03:08:26,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:26,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:08:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:08:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:08:26,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-29 03:08:26,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:26,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:26,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-29 03:08:26,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:28,033 INFO L124 PetriNetUnfolderBase]: 15234/21132 cut-off events. [2023-11-29 03:08:28,033 INFO L125 PetriNetUnfolderBase]: For 9480/9480 co-relation queries the response was YES. [2023-11-29 03:08:28,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48755 conditions, 21132 events. 15234/21132 cut-off events. For 9480/9480 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 133817 event pairs, 8560 based on Foata normal form. 362/19789 useless extension candidates. Maximal degree in co-relation 48723. Up to 14690 conditions per place. [2023-11-29 03:08:28,205 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 96 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-11-29 03:08:28,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 600 flow [2023-11-29 03:08:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:08:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:08:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2023-11-29 03:08:28,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6791044776119403 [2023-11-29 03:08:28,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 182 transitions. [2023-11-29 03:08:28,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 182 transitions. [2023-11-29 03:08:28,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:28,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 182 transitions. [2023-11-29 03:08:28,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:28,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:28,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:28,209 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 248 flow. Second operand 4 states and 182 transitions. [2023-11-29 03:08:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 600 flow [2023-11-29 03:08:28,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 590 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:08:28,224 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 267 flow [2023-11-29 03:08:28,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-11-29 03:08:28,226 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 14 predicate places. [2023-11-29 03:08:28,226 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 267 flow [2023-11-29 03:08:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:28,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:28,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 03:08:28,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:28,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1719244382, now seen corresponding path program 1 times [2023-11-29 03:08:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520276719] [2023-11-29 03:08:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:28,288 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 03:08:28,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:28,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520276719] [2023-11-29 03:08:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520276719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:28,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:08:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986910102] [2023-11-29 03:08:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:28,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:08:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:08:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:08:28,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2023-11-29 03:08:28,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:28,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:28,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2023-11-29 03:08:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:29,582 INFO L124 PetriNetUnfolderBase]: 6779/11771 cut-off events. [2023-11-29 03:08:29,582 INFO L125 PetriNetUnfolderBase]: For 5729/6876 co-relation queries the response was YES. [2023-11-29 03:08:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26105 conditions, 11771 events. 6779/11771 cut-off events. For 5729/6876 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 91283 event pairs, 907 based on Foata normal form. 574/11337 useless extension candidates. Maximal degree in co-relation 26074. Up to 7479 conditions per place. [2023-11-29 03:08:29,658 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 71 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-29 03:08:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 98 transitions, 497 flow [2023-11-29 03:08:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:08:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:08:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-29 03:08:29,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6965174129353234 [2023-11-29 03:08:29,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-29 03:08:29,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-29 03:08:29,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:29,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-29 03:08:29,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:29,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:29,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:29,661 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 267 flow. Second operand 3 states and 140 transitions. [2023-11-29 03:08:29,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 98 transitions, 497 flow [2023-11-29 03:08:29,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:08:29,665 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 272 flow [2023-11-29 03:08:29,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-11-29 03:08:29,666 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-11-29 03:08:29,666 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 272 flow [2023-11-29 03:08:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:29,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:29,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 03:08:29,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1780497831, now seen corresponding path program 1 times [2023-11-29 03:08:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262809804] [2023-11-29 03:08:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:29,733 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 03:08:29,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:29,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262809804] [2023-11-29 03:08:29,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262809804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:29,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:29,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:08:29,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385781724] [2023-11-29 03:08:29,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:29,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:08:29,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:08:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:08:29,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-29 03:08:29,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:29,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-29 03:08:29,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:31,426 INFO L124 PetriNetUnfolderBase]: 13154/18507 cut-off events. [2023-11-29 03:08:31,426 INFO L125 PetriNetUnfolderBase]: For 8564/10707 co-relation queries the response was YES. [2023-11-29 03:08:31,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44184 conditions, 18507 events. 13154/18507 cut-off events. For 8564/10707 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 118796 event pairs, 5910 based on Foata normal form. 1740/19715 useless extension candidates. Maximal degree in co-relation 44151. Up to 12456 conditions per place. [2023-11-29 03:08:31,560 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 90 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2023-11-29 03:08:31,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 116 transitions, 576 flow [2023-11-29 03:08:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:08:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:08:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2023-11-29 03:08:31,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6828358208955224 [2023-11-29 03:08:31,562 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 183 transitions. [2023-11-29 03:08:31,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 183 transitions. [2023-11-29 03:08:31,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:31,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 183 transitions. [2023-11-29 03:08:31,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:31,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:31,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:31,564 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 272 flow. Second operand 4 states and 183 transitions. [2023-11-29 03:08:31,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 116 transitions, 576 flow [2023-11-29 03:08:31,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:08:31,577 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 289 flow [2023-11-29 03:08:31,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-29 03:08:31,578 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 19 predicate places. [2023-11-29 03:08:31,578 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 289 flow [2023-11-29 03:08:31,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 03:08:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:08:31,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:31,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 12335042, now seen corresponding path program 2 times [2023-11-29 03:08:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270762204] [2023-11-29 03:08:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:31,758 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 03:08:31,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:31,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270762204] [2023-11-29 03:08:31,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270762204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:31,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325071046] [2023-11-29 03:08:31,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:08:31,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:31,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:31,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:08:31,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:08:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:08:31,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:08:31,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:31,924 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 03:08:31,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:31,958 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 03:08:31,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325071046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:31,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:31,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 03:08:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737465389] [2023-11-29 03:08:31,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:08:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:08:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:08:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-29 03:08:31,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 289 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:31,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:31,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-29 03:08:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:33,354 INFO L124 PetriNetUnfolderBase]: 8547/11703 cut-off events. [2023-11-29 03:08:33,354 INFO L125 PetriNetUnfolderBase]: For 11076/12451 co-relation queries the response was YES. [2023-11-29 03:08:33,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31350 conditions, 11703 events. 8547/11703 cut-off events. For 11076/12451 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 69706 event pairs, 6210 based on Foata normal form. 690/11729 useless extension candidates. Maximal degree in co-relation 31308. Up to 10960 conditions per place. [2023-11-29 03:08:33,435 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 35 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2023-11-29 03:08:33,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 78 transitions, 403 flow [2023-11-29 03:08:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:08:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:08:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 428 transitions. [2023-11-29 03:08:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562899786780384 [2023-11-29 03:08:33,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 428 transitions. [2023-11-29 03:08:33,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 428 transitions. [2023-11-29 03:08:33,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:33,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 428 transitions. [2023-11-29 03:08:33,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:33,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:33,442 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:33,442 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 289 flow. Second operand 14 states and 428 transitions. [2023-11-29 03:08:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 78 transitions, 403 flow [2023-11-29 03:08:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 78 transitions, 385 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-29 03:08:33,457 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 315 flow [2023-11-29 03:08:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=315, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2023-11-29 03:08:33,458 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 25 predicate places. [2023-11-29 03:08:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 315 flow [2023-11-29 03:08:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:33,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:33,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:33,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:08:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:33,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:33,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash -433486753, now seen corresponding path program 1 times [2023-11-29 03:08:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:33,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288553378] [2023-11-29 03:08:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:33,746 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 03:08:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288553378] [2023-11-29 03:08:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288553378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:33,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:33,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:08:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673678287] [2023-11-29 03:08:33,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:08:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:08:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:08:33,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-29 03:08:33,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:33,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:33,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-29 03:08:33,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:34,790 INFO L124 PetriNetUnfolderBase]: 8078/13150 cut-off events. [2023-11-29 03:08:34,791 INFO L125 PetriNetUnfolderBase]: For 8216/9595 co-relation queries the response was YES. [2023-11-29 03:08:34,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31006 conditions, 13150 events. 8078/13150 cut-off events. For 8216/9595 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 97122 event pairs, 1981 based on Foata normal form. 746/13212 useless extension candidates. Maximal degree in co-relation 30908. Up to 7479 conditions per place. [2023-11-29 03:08:34,880 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 75 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-11-29 03:08:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 554 flow [2023-11-29 03:08:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:08:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:08:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2023-11-29 03:08:34,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865671641791045 [2023-11-29 03:08:34,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2023-11-29 03:08:34,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2023-11-29 03:08:34,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:34,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2023-11-29 03:08:34,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 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 03:08:34,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:34,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:34,884 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 315 flow. Second operand 3 states and 138 transitions. [2023-11-29 03:08:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 554 flow [2023-11-29 03:08:34,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 486 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-29 03:08:34,894 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 255 flow [2023-11-29 03:08:34,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-11-29 03:08:34,895 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-11-29 03:08:34,895 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 255 flow [2023-11-29 03:08:34,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:34,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:34,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:34,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 03:08:34,896 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:34,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1657878414, now seen corresponding path program 1 times [2023-11-29 03:08:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:34,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750049124] [2023-11-29 03:08:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:34,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:34,943 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 03:08:34,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:34,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750049124] [2023-11-29 03:08:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750049124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:34,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:08:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7466777] [2023-11-29 03:08:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:08:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:08:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:08:34,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-29 03:08:34,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:34,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:34,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-29 03:08:34,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:37,254 INFO L124 PetriNetUnfolderBase]: 18538/25846 cut-off events. [2023-11-29 03:08:37,254 INFO L125 PetriNetUnfolderBase]: For 20232/23339 co-relation queries the response was YES. [2023-11-29 03:08:37,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66821 conditions, 25846 events. 18538/25846 cut-off events. For 20232/23339 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 166196 event pairs, 10367 based on Foata normal form. 2042/26760 useless extension candidates. Maximal degree in co-relation 42980. Up to 17448 conditions per place. [2023-11-29 03:08:37,467 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 105 selfloop transitions, 4 changer transitions 0/130 dead transitions. [2023-11-29 03:08:37,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 663 flow [2023-11-29 03:08:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:08:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:08:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2023-11-29 03:08:37,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6791044776119403 [2023-11-29 03:08:37,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 182 transitions. [2023-11-29 03:08:37,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 182 transitions. [2023-11-29 03:08:37,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:37,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 182 transitions. [2023-11-29 03:08:37,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:37,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:37,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:37,472 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 255 flow. Second operand 4 states and 182 transitions. [2023-11-29 03:08:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 663 flow [2023-11-29 03:08:37,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 651 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 03:08:37,498 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 276 flow [2023-11-29 03:08:37,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-11-29 03:08:37,499 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-11-29 03:08:37,499 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 276 flow [2023-11-29 03:08:37,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:37,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:37,499 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 03:08:37,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:08:37,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:37,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -553187529, now seen corresponding path program 1 times [2023-11-29 03:08:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:37,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635188790] [2023-11-29 03:08:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:37,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:37,598 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 03:08:37,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:37,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635188790] [2023-11-29 03:08:37,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635188790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:08:37,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:08:37,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:08:37,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138855459] [2023-11-29 03:08:37,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:08:37,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:08:37,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:08:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:08:37,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-29 03:08:37,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:37,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:37,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-29 03:08:37,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:39,158 INFO L124 PetriNetUnfolderBase]: 11141/17699 cut-off events. [2023-11-29 03:08:39,159 INFO L125 PetriNetUnfolderBase]: For 12357/14601 co-relation queries the response was YES. [2023-11-29 03:08:39,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46342 conditions, 17699 events. 11141/17699 cut-off events. For 12357/14601 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 130995 event pairs, 1957 based on Foata normal form. 1258/18691 useless extension candidates. Maximal degree in co-relation 30195. Up to 11608 conditions per place. [2023-11-29 03:08:39,269 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 77 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-11-29 03:08:39,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 104 transitions, 521 flow [2023-11-29 03:08:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:08:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:08:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2023-11-29 03:08:39,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865671641791045 [2023-11-29 03:08:39,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2023-11-29 03:08:39,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2023-11-29 03:08:39,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:39,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2023-11-29 03:08:39,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 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 03:08:39,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:39,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:39,272 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 276 flow. Second operand 3 states and 138 transitions. [2023-11-29 03:08:39,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 104 transitions, 521 flow [2023-11-29 03:08:39,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:08:39,323 INFO L231 Difference]: Finished difference. Result has 90 places, 81 transitions, 281 flow [2023-11-29 03:08:39,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2023-11-29 03:08:39,324 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 20 predicate places. [2023-11-29 03:08:39,324 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 281 flow [2023-11-29 03:08:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:39,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:39,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 03:08:39,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash -34591016, now seen corresponding path program 1 times [2023-11-29 03:08:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:39,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343689037] [2023-11-29 03:08:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:39,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343689037] [2023-11-29 03:08:39,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343689037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034099528] [2023-11-29 03:08:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:39,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:39,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:39,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:39,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:08:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:39,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:08:39,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:39,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034099528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:39,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 03:08:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372600497] [2023-11-29 03:08:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:08:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:08:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:08:39,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 67 [2023-11-29 03:08:39,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 281 flow. Second operand has 20 states, 20 states have (on average 24.75) internal successors, (495), 20 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:39,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:39,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 67 [2023-11-29 03:08:39,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:43,636 INFO L124 PetriNetUnfolderBase]: 27554/36987 cut-off events. [2023-11-29 03:08:43,636 INFO L125 PetriNetUnfolderBase]: For 25685/35626 co-relation queries the response was YES. [2023-11-29 03:08:43,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98998 conditions, 36987 events. 27554/36987 cut-off events. For 25685/35626 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 238543 event pairs, 15855 based on Foata normal form. 5379/42112 useless extension candidates. Maximal degree in co-relation 62833. Up to 23186 conditions per place. [2023-11-29 03:08:43,925 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 144 selfloop transitions, 18 changer transitions 0/183 dead transitions. [2023-11-29 03:08:43,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 183 transitions, 932 flow [2023-11-29 03:08:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:08:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:08:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 360 transitions. [2023-11-29 03:08:43,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-11-29 03:08:43,928 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 360 transitions. [2023-11-29 03:08:43,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 360 transitions. [2023-11-29 03:08:43,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:43,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 360 transitions. [2023-11-29 03:08:43,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:43,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:43,932 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:43,932 INFO L175 Difference]: Start difference. First operand has 90 places, 81 transitions, 281 flow. Second operand 10 states and 360 transitions. [2023-11-29 03:08:43,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 183 transitions, 932 flow [2023-11-29 03:08:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 928 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:08:44,046 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 367 flow [2023-11-29 03:08:44,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-11-29 03:08:44,047 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 31 predicate places. [2023-11-29 03:08:44,047 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 367 flow [2023-11-29 03:08:44,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.75) internal successors, (495), 20 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:44,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:08:44,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:08:44,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:44,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash 114326250, now seen corresponding path program 1 times [2023-11-29 03:08:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88007756] [2023-11-29 03:08:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:08:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88007756] [2023-11-29 03:08:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88007756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064923732] [2023-11-29 03:08:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:44,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:44,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:44,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:44,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:08:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:44,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:08:44,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:44,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:44,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064923732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:44,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:44,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-29 03:08:44,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735435398] [2023-11-29 03:08:44,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:44,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:08:44,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:08:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:08:44,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2023-11-29 03:08:44,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 367 flow. Second operand has 19 states, 19 states have (on average 24.105263157894736) internal successors, (458), 19 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:44,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:44,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2023-11-29 03:08:44,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:49,549 INFO L124 PetriNetUnfolderBase]: 29377/40490 cut-off events. [2023-11-29 03:08:49,549 INFO L125 PetriNetUnfolderBase]: For 60819/67814 co-relation queries the response was YES. [2023-11-29 03:08:49,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120300 conditions, 40490 events. 29377/40490 cut-off events. For 60819/67814 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 271658 event pairs, 8134 based on Foata normal form. 4065/43735 useless extension candidates. Maximal degree in co-relation 82894. Up to 8065 conditions per place. [2023-11-29 03:08:49,889 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 239 selfloop transitions, 25 changer transitions 0/285 dead transitions. [2023-11-29 03:08:49,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 285 transitions, 1715 flow [2023-11-29 03:08:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:08:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:08:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 522 transitions. [2023-11-29 03:08:49,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565031982942431 [2023-11-29 03:08:49,892 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 522 transitions. [2023-11-29 03:08:49,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 522 transitions. [2023-11-29 03:08:49,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:49,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 522 transitions. [2023-11-29 03:08:49,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 37.285714285714285) internal successors, (522), 14 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:49,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:49,895 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:49,895 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 367 flow. Second operand 14 states and 522 transitions. [2023-11-29 03:08:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 285 transitions, 1715 flow [2023-11-29 03:08:50,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 285 transitions, 1682 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-29 03:08:50,398 INFO L231 Difference]: Finished difference. Result has 109 places, 90 transitions, 412 flow [2023-11-29 03:08:50,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=90} [2023-11-29 03:08:50,398 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 39 predicate places. [2023-11-29 03:08:50,398 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 90 transitions, 412 flow [2023-11-29 03:08:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 24.105263157894736) internal successors, (458), 19 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:50,399 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 03:08:50,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:08:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:08:50,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:50,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash -820960980, now seen corresponding path program 1 times [2023-11-29 03:08:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433605531] [2023-11-29 03:08:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:50,789 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 03:08:50,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433605531] [2023-11-29 03:08:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433605531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244907607] [2023-11-29 03:08:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:50,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:50,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:08:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:50,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:08:50,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:50,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:08:50,990 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 17 treesize of output 9 [2023-11-29 03:08:51,000 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 03:08:51,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:51,062 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 16 treesize of output 14 [2023-11-29 03:08:51,068 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 22 treesize of output 20 [2023-11-29 03:08:51,081 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 03:08:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244907607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:51,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 03:08:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351657121] [2023-11-29 03:08:51,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:08:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:08:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:08:51,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 67 [2023-11-29 03:08:51,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 90 transitions, 412 flow. Second operand has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:51,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:51,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 67 [2023-11-29 03:08:51,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:53,127 INFO L124 PetriNetUnfolderBase]: 14594/21351 cut-off events. [2023-11-29 03:08:53,127 INFO L125 PetriNetUnfolderBase]: For 35563/39032 co-relation queries the response was YES. [2023-11-29 03:08:53,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63487 conditions, 21351 events. 14594/21351 cut-off events. For 35563/39032 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 149899 event pairs, 11404 based on Foata normal form. 2281/22922 useless extension candidates. Maximal degree in co-relation 39015. Up to 19131 conditions per place. [2023-11-29 03:08:53,282 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 51 selfloop transitions, 8 changer transitions 2/89 dead transitions. [2023-11-29 03:08:53,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 89 transitions, 528 flow [2023-11-29 03:08:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:08:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:08:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2023-11-29 03:08:53,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223880597014925 [2023-11-29 03:08:53,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 210 transitions. [2023-11-29 03:08:53,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 210 transitions. [2023-11-29 03:08:53,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:53,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 210 transitions. [2023-11-29 03:08:53,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:53,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:53,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:53,285 INFO L175 Difference]: Start difference. First operand has 109 places, 90 transitions, 412 flow. Second operand 6 states and 210 transitions. [2023-11-29 03:08:53,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 89 transitions, 528 flow [2023-11-29 03:08:53,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 89 transitions, 487 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-29 03:08:53,348 INFO L231 Difference]: Finished difference. Result has 104 places, 87 transitions, 376 flow [2023-11-29 03:08:53,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=104, PETRI_TRANSITIONS=87} [2023-11-29 03:08:53,349 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2023-11-29 03:08:53,349 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 87 transitions, 376 flow [2023-11-29 03:08:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:53,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:53,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:53,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:08:53,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:53,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:53,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1783753648, now seen corresponding path program 2 times [2023-11-29 03:08:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569458233] [2023-11-29 03:08:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569458233] [2023-11-29 03:08:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569458233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277659377] [2023-11-29 03:08:53,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:08:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:53,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:53,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:08:54,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:08:54,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:08:54,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 03:08:54,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:54,159 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 19 treesize of output 1 [2023-11-29 03:08:54,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:08:54,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 24 [2023-11-29 03:08:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:54,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:54,392 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 18 treesize of output 16 [2023-11-29 03:08:54,395 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 24 treesize of output 20 [2023-11-29 03:08:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277659377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:54,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:54,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 03:08:54,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124511478] [2023-11-29 03:08:54,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:54,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:08:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:08:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:08:54,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-29 03:08:54,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 87 transitions, 376 flow. Second operand has 23 states, 23 states have (on average 25.956521739130434) internal successors, (597), 23 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:54,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:08:54,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-29 03:08:54,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:08:58,819 INFO L124 PetriNetUnfolderBase]: 27874/39359 cut-off events. [2023-11-29 03:08:58,819 INFO L125 PetriNetUnfolderBase]: For 39626/46148 co-relation queries the response was YES. [2023-11-29 03:08:58,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109822 conditions, 39359 events. 27874/39359 cut-off events. For 39626/46148 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 272644 event pairs, 7192 based on Foata normal form. 3133/42212 useless extension candidates. Maximal degree in co-relation 85550. Up to 8750 conditions per place. [2023-11-29 03:08:59,106 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 189 selfloop transitions, 21 changer transitions 8/241 dead transitions. [2023-11-29 03:08:59,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 241 transitions, 1289 flow [2023-11-29 03:08:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:08:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:08:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 515 transitions. [2023-11-29 03:08:59,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490405117270789 [2023-11-29 03:08:59,109 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 515 transitions. [2023-11-29 03:08:59,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 515 transitions. [2023-11-29 03:08:59,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:08:59,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 515 transitions. [2023-11-29 03:08:59,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 36.785714285714285) internal successors, (515), 14 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:59,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:59,113 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:59,113 INFO L175 Difference]: Start difference. First operand has 104 places, 87 transitions, 376 flow. Second operand 14 states and 515 transitions. [2023-11-29 03:08:59,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 241 transitions, 1289 flow [2023-11-29 03:08:59,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 241 transitions, 1278 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:08:59,239 INFO L231 Difference]: Finished difference. Result has 113 places, 91 transitions, 446 flow [2023-11-29 03:08:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=446, PETRI_PLACES=113, PETRI_TRANSITIONS=91} [2023-11-29 03:08:59,239 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 43 predicate places. [2023-11-29 03:08:59,239 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 91 transitions, 446 flow [2023-11-29 03:08:59,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.956521739130434) internal successors, (597), 23 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:08:59,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:08:59,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:08:59,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:08:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:08:59,440 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:08:59,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:08:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1473051257, now seen corresponding path program 1 times [2023-11-29 03:08:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:08:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103281315] [2023-11-29 03:08:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:08:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:08:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:08:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103281315] [2023-11-29 03:08:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103281315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:08:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848305896] [2023-11-29 03:08:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:08:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:08:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:08:59,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:08:59,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:08:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:08:59,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:08:59,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:08:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:59,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:08:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:08:59,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848305896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:08:59,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:08:59,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-29 03:08:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983705218] [2023-11-29 03:08:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:08:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:08:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:08:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:08:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:09:00,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2023-11-29 03:09:00,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 91 transitions, 446 flow. Second operand has 19 states, 19 states have (on average 24.31578947368421) internal successors, (462), 19 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:00,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:00,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2023-11-29 03:09:00,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:05,362 INFO L124 PetriNetUnfolderBase]: 32639/45702 cut-off events. [2023-11-29 03:09:05,362 INFO L125 PetriNetUnfolderBase]: For 113506/116145 co-relation queries the response was YES. [2023-11-29 03:09:05,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148098 conditions, 45702 events. 32639/45702 cut-off events. For 113506/116145 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 308801 event pairs, 7818 based on Foata normal form. 866/45624 useless extension candidates. Maximal degree in co-relation 121122. Up to 8585 conditions per place. [2023-11-29 03:09:05,649 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 174 selfloop transitions, 19 changer transitions 80/292 dead transitions. [2023-11-29 03:09:05,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 292 transitions, 2006 flow [2023-11-29 03:09:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:09:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:09:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 509 transitions. [2023-11-29 03:09:05,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426439232409381 [2023-11-29 03:09:05,650 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 509 transitions. [2023-11-29 03:09:05,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 509 transitions. [2023-11-29 03:09:05,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:05,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 509 transitions. [2023-11-29 03:09:05,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 36.357142857142854) internal successors, (509), 14 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:05,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:05,653 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:05,653 INFO L175 Difference]: Start difference. First operand has 113 places, 91 transitions, 446 flow. Second operand 14 states and 509 transitions. [2023-11-29 03:09:05,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 292 transitions, 2006 flow [2023-11-29 03:09:05,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 292 transitions, 1861 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-29 03:09:05,882 INFO L231 Difference]: Finished difference. Result has 115 places, 78 transitions, 361 flow [2023-11-29 03:09:05,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=361, PETRI_PLACES=115, PETRI_TRANSITIONS=78} [2023-11-29 03:09:05,882 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 45 predicate places. [2023-11-29 03:09:05,882 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 78 transitions, 361 flow [2023-11-29 03:09:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 24.31578947368421) internal successors, (462), 19 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:05,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:05,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:09:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:09:06,083 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:09:06,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1931037747, now seen corresponding path program 1 times [2023-11-29 03:09:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:06,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335274936] [2023-11-29 03:09:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335274936] [2023-11-29 03:09:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335274936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:09:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699437059] [2023-11-29 03:09:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:06,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:06,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:06,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:06,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:09:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:06,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:09:06,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:06,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:06,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699437059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:06,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:09:06,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 03:09:06,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834564069] [2023-11-29 03:09:06,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:06,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:09:06,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:09:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:09:06,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-29 03:09:06,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 78 transitions, 361 flow. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:06,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:06,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-29 03:09:06,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:12,025 INFO L124 PetriNetUnfolderBase]: 38497/55855 cut-off events. [2023-11-29 03:09:12,025 INFO L125 PetriNetUnfolderBase]: For 110075/113867 co-relation queries the response was YES. [2023-11-29 03:09:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174843 conditions, 55855 events. 38497/55855 cut-off events. For 110075/113867 co-relation queries the response was YES. Maximal size of possible extension queue 1274. Compared 397747 event pairs, 13441 based on Foata normal form. 1560/56539 useless extension candidates. Maximal degree in co-relation 174751. Up to 23039 conditions per place. [2023-11-29 03:09:12,442 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 266 selfloop transitions, 13 changer transitions 0/299 dead transitions. [2023-11-29 03:09:12,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 299 transitions, 2049 flow [2023-11-29 03:09:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:09:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:09:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 447 transitions. [2023-11-29 03:09:12,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6671641791044776 [2023-11-29 03:09:12,444 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 447 transitions. [2023-11-29 03:09:12,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 447 transitions. [2023-11-29 03:09:12,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:12,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 447 transitions. [2023-11-29 03:09:12,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.7) internal successors, (447), 10 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,446 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,446 INFO L175 Difference]: Start difference. First operand has 115 places, 78 transitions, 361 flow. Second operand 10 states and 447 transitions. [2023-11-29 03:09:12,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 299 transitions, 2049 flow [2023-11-29 03:09:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 299 transitions, 1838 flow, removed 31 selfloop flow, removed 14 redundant places. [2023-11-29 03:09:12,617 INFO L231 Difference]: Finished difference. Result has 103 places, 87 transitions, 372 flow [2023-11-29 03:09:12,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=372, PETRI_PLACES=103, PETRI_TRANSITIONS=87} [2023-11-29 03:09:12,618 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2023-11-29 03:09:12,618 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 87 transitions, 372 flow [2023-11-29 03:09:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:12,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:12,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:09:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:09:12,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:09:12,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash -495283437, now seen corresponding path program 1 times [2023-11-29 03:09:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:12,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332210641] [2023-11-29 03:09:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:12,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:12,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332210641] [2023-11-29 03:09:12,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332210641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:09:12,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206690357] [2023-11-29 03:09:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:12,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:12,895 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:12,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:09:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:13,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:09:13,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:13,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206690357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:13,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:09:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 03:09:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277841187] [2023-11-29 03:09:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:13,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:09:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:09:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:09:13,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-29 03:09:13,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 87 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:13,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:13,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-29 03:09:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:18,313 INFO L124 PetriNetUnfolderBase]: 40013/57243 cut-off events. [2023-11-29 03:09:18,314 INFO L125 PetriNetUnfolderBase]: For 77961/81141 co-relation queries the response was YES. [2023-11-29 03:09:18,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166967 conditions, 57243 events. 40013/57243 cut-off events. For 77961/81141 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 405496 event pairs, 4247 based on Foata normal form. 1672/58611 useless extension candidates. Maximal degree in co-relation 166896. Up to 18551 conditions per place. [2023-11-29 03:09:18,695 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 162 selfloop transitions, 9 changer transitions 0/194 dead transitions. [2023-11-29 03:09:18,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 194 transitions, 1174 flow [2023-11-29 03:09:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:09:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:09:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 262 transitions. [2023-11-29 03:09:18,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6517412935323383 [2023-11-29 03:09:18,696 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 262 transitions. [2023-11-29 03:09:18,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 262 transitions. [2023-11-29 03:09:18,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:18,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 262 transitions. [2023-11-29 03:09:18,697 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 03:09:18,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:18,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:18,698 INFO L175 Difference]: Start difference. First operand has 103 places, 87 transitions, 372 flow. Second operand 6 states and 262 transitions. [2023-11-29 03:09:18,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 194 transitions, 1174 flow [2023-11-29 03:09:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 194 transitions, 1131 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-29 03:09:19,025 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 375 flow [2023-11-29 03:09:19,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=105, PETRI_TRANSITIONS=86} [2023-11-29 03:09:19,026 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2023-11-29 03:09:19,026 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 375 flow [2023-11-29 03:09:19,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:19,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:19,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:19,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:09:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:19,227 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:09:19,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1826083273, now seen corresponding path program 1 times [2023-11-29 03:09:19,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:19,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897167254] [2023-11-29 03:09:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:19,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:19,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897167254] [2023-11-29 03:09:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897167254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:09:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042071931] [2023-11-29 03:09:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:19,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:19,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:19,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:09:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:19,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:09:19,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:19,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042071931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:19,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:09:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 03:09:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100239225] [2023-11-29 03:09:19,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:09:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:09:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:09:19,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-29 03:09:19,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 86 transitions, 375 flow. Second operand has 12 states, 12 states have (on average 28.25) internal successors, (339), 12 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:19,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:19,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-29 03:09:19,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:28,628 INFO L124 PetriNetUnfolderBase]: 60634/87228 cut-off events. [2023-11-29 03:09:28,628 INFO L125 PetriNetUnfolderBase]: For 144704/148968 co-relation queries the response was YES. [2023-11-29 03:09:28,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264366 conditions, 87228 events. 60634/87228 cut-off events. For 144704/148968 co-relation queries the response was YES. Maximal size of possible extension queue 1881. Compared 638808 event pairs, 13746 based on Foata normal form. 2508/88852 useless extension candidates. Maximal degree in co-relation 264294. Up to 28810 conditions per place. [2023-11-29 03:09:29,340 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 277 selfloop transitions, 13 changer transitions 0/313 dead transitions. [2023-11-29 03:09:29,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 313 transitions, 1897 flow [2023-11-29 03:09:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:09:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:09:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 450 transitions. [2023-11-29 03:09:29,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6716417910447762 [2023-11-29 03:09:29,343 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 450 transitions. [2023-11-29 03:09:29,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 450 transitions. [2023-11-29 03:09:29,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:29,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 450 transitions. [2023-11-29 03:09:29,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:29,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:29,346 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:29,346 INFO L175 Difference]: Start difference. First operand has 105 places, 86 transitions, 375 flow. Second operand 10 states and 450 transitions. [2023-11-29 03:09:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 313 transitions, 1897 flow [2023-11-29 03:09:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 313 transitions, 1867 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-29 03:09:29,664 INFO L231 Difference]: Finished difference. Result has 112 places, 93 transitions, 443 flow [2023-11-29 03:09:29,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=443, PETRI_PLACES=112, PETRI_TRANSITIONS=93} [2023-11-29 03:09:29,665 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 42 predicate places. [2023-11-29 03:09:29,665 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 93 transitions, 443 flow [2023-11-29 03:09:29,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.25) internal successors, (339), 12 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:29,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:29,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:29,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:09:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:29,866 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:09:29,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1896617794, now seen corresponding path program 1 times [2023-11-29 03:09:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156359983] [2023-11-29 03:09:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156359983] [2023-11-29 03:09:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156359983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:09:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342739532] [2023-11-29 03:09:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:29,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:29,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:29,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:09:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:30,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:09:30,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:30,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:09:30,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342739532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:30,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:09:30,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 03:09:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683902494] [2023-11-29 03:09:30,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:30,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:09:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:09:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:09:30,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-29 03:09:30,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 93 transitions, 443 flow. Second operand has 12 states, 12 states have (on average 27.166666666666668) internal successors, (326), 12 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:30,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:30,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-29 03:09:30,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:50,495 INFO L124 PetriNetUnfolderBase]: 130771/185757 cut-off events. [2023-11-29 03:09:50,495 INFO L125 PetriNetUnfolderBase]: For 398828/405683 co-relation queries the response was YES. [2023-11-29 03:09:51,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583751 conditions, 185757 events. 130771/185757 cut-off events. For 398828/405683 co-relation queries the response was YES. Maximal size of possible extension queue 3084. Compared 1407407 event pairs, 40187 based on Foata normal form. 5298/188354 useless extension candidates. Maximal degree in co-relation 583677. Up to 70455 conditions per place. [2023-11-29 03:09:52,283 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 356 selfloop transitions, 13 changer transitions 0/394 dead transitions. [2023-11-29 03:09:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 394 transitions, 2956 flow [2023-11-29 03:09:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:09:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:09:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 447 transitions. [2023-11-29 03:09:52,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6671641791044776 [2023-11-29 03:09:52,285 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 447 transitions. [2023-11-29 03:09:52,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 447 transitions. [2023-11-29 03:09:52,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:52,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 447 transitions. [2023-11-29 03:09:52,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.7) internal successors, (447), 10 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:52,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:52,288 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:52,288 INFO L175 Difference]: Start difference. First operand has 112 places, 93 transitions, 443 flow. Second operand 10 states and 447 transitions. [2023-11-29 03:09:52,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 394 transitions, 2956 flow [2023-11-29 03:09:53,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 394 transitions, 2900 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:09:53,476 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 518 flow [2023-11-29 03:09:53,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=518, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2023-11-29 03:09:53,476 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 51 predicate places. [2023-11-29 03:09:53,476 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 518 flow [2023-11-29 03:09:53,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.166666666666668) internal successors, (326), 12 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:53,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:53,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:53,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:09:53,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:53,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:09:53,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1775578644, now seen corresponding path program 3 times [2023-11-29 03:09:53,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:09:53,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309078608] [2023-11-29 03:09:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:53,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:09:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:53,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:09:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309078608] [2023-11-29 03:09:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309078608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:09:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633169706] [2023-11-29 03:09:53,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:09:53,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:09:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:53,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:09:53,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:09:54,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 03:09:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:09:54,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:09:54,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:54,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:54,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633169706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:54,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:09:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-29 03:09:54,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079796521] [2023-11-29 03:09:54,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 03:09:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:09:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 03:09:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:09:54,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 67 [2023-11-29 03:09:54,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 518 flow. Second operand has 30 states, 30 states have (on average 24.633333333333333) internal successors, (739), 30 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:54,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:54,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 67 [2023-11-29 03:09:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:28,031 INFO L124 PetriNetUnfolderBase]: 207010/275442 cut-off events. [2023-11-29 03:10:28,031 INFO L125 PetriNetUnfolderBase]: For 482580/498860 co-relation queries the response was YES. [2023-11-29 03:10:29,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889576 conditions, 275442 events. 207010/275442 cut-off events. For 482580/498860 co-relation queries the response was YES. Maximal size of possible extension queue 4723. Compared 1962604 event pairs, 123142 based on Foata normal form. 1532/276178 useless extension candidates. Maximal degree in co-relation 738364. Up to 186063 conditions per place. [2023-11-29 03:10:30,443 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 259 selfloop transitions, 21 changer transitions 12/317 dead transitions. [2023-11-29 03:10:30,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 317 transitions, 2141 flow [2023-11-29 03:10:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:10:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:10:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 483 transitions. [2023-11-29 03:10:30,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149253731343284 [2023-11-29 03:10:30,444 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 483 transitions. [2023-11-29 03:10:30,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 483 transitions. [2023-11-29 03:10:30,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:30,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 483 transitions. [2023-11-29 03:10:30,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 34.5) internal successors, (483), 14 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:30,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:30,448 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:30,448 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 518 flow. Second operand 14 states and 483 transitions. [2023-11-29 03:10:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 317 transitions, 2141 flow [2023-11-29 03:10:41,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 317 transitions, 2082 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-11-29 03:10:41,270 INFO L231 Difference]: Finished difference. Result has 138 places, 110 transitions, 649 flow [2023-11-29 03:10:41,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=649, PETRI_PLACES=138, PETRI_TRANSITIONS=110} [2023-11-29 03:10:41,270 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 68 predicate places. [2023-11-29 03:10:41,270 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 110 transitions, 649 flow [2023-11-29 03:10:41,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 24.633333333333333) internal successors, (739), 30 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:41,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:41,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:10:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:10:41,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-11-29 03:10:41,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash -666386588, now seen corresponding path program 4 times [2023-11-29 03:10:41,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:10:41,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519306896] [2023-11-29 03:10:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:10:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:41,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:10:41,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519306896] [2023-11-29 03:10:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519306896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:10:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87394077] [2023-11-29 03:10:41,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:10:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:10:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:10:41,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:10:41,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8700087e-e617-4e93-9486-7080fdfbbf30/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:10:42,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:10:42,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:10:42,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 03:10:42,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:42,147 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 19 treesize of output 1 [2023-11-29 03:10:42,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:10:42,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 24 [2023-11-29 03:10:42,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:10:42,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 26 [2023-11-29 03:10:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:42,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:10:42,474 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 18 treesize of output 16 [2023-11-29 03:10:42,490 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 24 treesize of output 20 [2023-11-29 03:10:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:42,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87394077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:10:42,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:10:42,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-29 03:10:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945773913] [2023-11-29 03:10:42,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:10:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:10:42,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:10:42,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:10:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:10:42,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-29 03:10:42,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 110 transitions, 649 flow. Second operand has 24 states, 24 states have (on average 25.75) internal successors, (618), 24 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:42,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:42,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-29 03:10:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand