./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/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_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/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_5e1efabf-b2fa-4507-aab0-b260cf45d28b/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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:48:01,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:48:01,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 01:48:01,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:48:01,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:48:01,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:48:01,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:48:01,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:48:01,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:48:01,788 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:48:01,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:48:01,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:48:01,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:48:01,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:48:01,791 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:48:01,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:48:01,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:48:01,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:48:01,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:48:01,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:48:01,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:48:01,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:48:01,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:48:01,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:48:01,796 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 01:48:01,796 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:48:01,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:48:01,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:48:01,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:48:01,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:48:01,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:48:01,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:48:01,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:48:01,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:48:01,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:48:01,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:48:01,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:48:01,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:48:01,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:48:01,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:48:01,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:48:01,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:48:01,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:48:01,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:48:01,802 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_5e1efabf-b2fa-4507-aab0-b260cf45d28b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2023-11-29 01:48:02,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:48:02,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:48:02,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:48:02,048 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:48:02,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:48:02,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-29 01:48:04,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:48:04,939 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:48:04,948 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-29 01:48:04,963 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/data/af303c9ce/a2719c2c30a94b8c8c3e639e9aec52ce/FLAG609c97a63 [2023-11-29 01:48:04,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/data/af303c9ce/a2719c2c30a94b8c8c3e639e9aec52ce [2023-11-29 01:48:04,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:48:04,985 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:48:04,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:48:04,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:48:04,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:48:04,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:48:04" (1/1) ... [2023-11-29 01:48:04,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c213c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:04, skipping insertion in model container [2023-11-29 01:48:04,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:48:04" (1/1) ... [2023-11-29 01:48:05,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:48:05,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:48:05,250 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:48:05,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:48:05,289 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:48:05,289 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:48:05,298 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:48:05,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05 WrapperNode [2023-11-29 01:48:05,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:48:05,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:48:05,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:48:05,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:48:05,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,354 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 252 [2023-11-29 01:48:05,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:48:05,355 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:48:05,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:48:05,356 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:48:05,369 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,374 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,393 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 2, 2, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 01:48:05,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,412 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:48:05,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:48:05,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:48:05,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:48:05,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (1/1) ... [2023-11-29 01:48:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:48:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:05,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:48:05,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:48:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:48:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:48:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:48:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:48:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:48:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:48:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:48:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:48:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:48:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:48:05,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:48:05,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:48:05,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:48:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:48:05,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:48:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:48:05,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 01:48:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 01:48:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:48:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:48:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:48:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:48:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:48:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:48:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:48:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:48:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:48:05,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:48:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:48:05,495 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 01:48:05,635 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:48:05,637 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:48:06,009 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:48:06,407 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:48:06,407 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 01:48:06,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:48:06 BoogieIcfgContainer [2023-11-29 01:48:06,407 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:48:06,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:48:06,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:48:06,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:48:06,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:48:04" (1/3) ... [2023-11-29 01:48:06,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20920abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:48:06, skipping insertion in model container [2023-11-29 01:48:06,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:05" (2/3) ... [2023-11-29 01:48:06,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20920abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:48:06, skipping insertion in model container [2023-11-29 01:48:06,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:48:06" (3/3) ... [2023-11-29 01:48:06,417 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-11-29 01:48:06,428 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:48:06,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:48:06,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 01:48:06,440 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:48:06,587 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:48:06,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 67 transitions, 155 flow [2023-11-29 01:48:06,660 INFO L124 PetriNetUnfolderBase]: 4/64 cut-off events. [2023-11-29 01:48:06,660 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:48:06,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 4/64 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 230 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-29 01:48:06,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 67 transitions, 155 flow [2023-11-29 01:48:06,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 62 transitions, 139 flow [2023-11-29 01:48:06,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:48:06,686 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;@347c4bf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:48:06,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-29 01:48:06,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:48:06,690 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 01:48:06,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:48:06,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:06,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:48:06,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:06,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 795712, now seen corresponding path program 1 times [2023-11-29 01:48:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:06,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419014334] [2023-11-29 01:48:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419014334] [2023-11-29 01:48:06,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419014334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:06,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:06,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:48:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538705573] [2023-11-29 01:48:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:48:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:48:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:48:06,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-29 01:48:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:06,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-29 01:48:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:08,088 INFO L124 PetriNetUnfolderBase]: 3107/4793 cut-off events. [2023-11-29 01:48:08,088 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-29 01:48:08,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9442 conditions, 4793 events. 3107/4793 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 31347 event pairs, 2653 based on Foata normal form. 1/2747 useless extension candidates. Maximal degree in co-relation 8509. Up to 4425 conditions per place. [2023-11-29 01:48:08,136 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 39 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-11-29 01:48:08,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 219 flow [2023-11-29 01:48:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:48:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:48:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2023-11-29 01:48:08,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47388059701492535 [2023-11-29 01:48:08,149 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 127 transitions. [2023-11-29 01:48:08,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 127 transitions. [2023-11-29 01:48:08,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:08,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 127 transitions. [2023-11-29 01:48:08,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:08,158 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 01:48:08,159 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 01:48:08,160 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 139 flow. Second operand 4 states and 127 transitions. [2023-11-29 01:48:08,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 219 flow [2023-11-29 01:48:08,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 59 transitions, 210 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 01:48:08,171 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 147 flow [2023-11-29 01:48:08,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-29 01:48:08,177 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-11-29 01:48:08,177 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 147 flow [2023-11-29 01:48:08,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:08,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 01:48:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:48:08,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:08,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2063953794, now seen corresponding path program 1 times [2023-11-29 01:48:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156745905] [2023-11-29 01:48:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:08,312 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 01:48:08,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156745905] [2023-11-29 01:48:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156745905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166735825] [2023-11-29 01:48:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:08,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:08,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:08,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:08,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:48:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:08,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:48:08,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:08,492 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 01:48:08,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166735825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:08,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:48:08,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 01:48:08,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622140980] [2023-11-29 01:48:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:08,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:48:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:48:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:48:08,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-29 01:48:08,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:08,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:08,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-29 01:48:08,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:09,389 INFO L124 PetriNetUnfolderBase]: 3107/4792 cut-off events. [2023-11-29 01:48:09,389 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 01:48:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9370 conditions, 4792 events. 3107/4792 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 31345 event pairs, 2653 based on Foata normal form. 1/2747 useless extension candidates. Maximal degree in co-relation 9343. Up to 4420 conditions per place. [2023-11-29 01:48:09,434 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 35 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2023-11-29 01:48:09,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 227 flow [2023-11-29 01:48:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:48:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:48:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2023-11-29 01:48:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39054726368159204 [2023-11-29 01:48:09,437 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 157 transitions. [2023-11-29 01:48:09,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 157 transitions. [2023-11-29 01:48:09,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:09,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 157 transitions. [2023-11-29 01:48:09,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:09,441 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 01:48:09,441 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 01:48:09,441 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 147 flow. Second operand 6 states and 157 transitions. [2023-11-29 01:48:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 227 flow [2023-11-29 01:48:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:48:09,444 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 154 flow [2023-11-29 01:48:09,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-29 01:48:09,445 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-11-29 01:48:09,445 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 154 flow [2023-11-29 01:48:09,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:09,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:09,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 01:48:09,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:09,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:09,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:09,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2061403039, now seen corresponding path program 1 times [2023-11-29 01:48:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114281060] [2023-11-29 01:48:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:09,751 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 01:48:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:09,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114281060] [2023-11-29 01:48:09,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114281060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:09,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:09,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:48:09,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682386724] [2023-11-29 01:48:09,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:09,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:09,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2023-11-29 01:48:09,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:09,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:09,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2023-11-29 01:48:09,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:11,021 INFO L124 PetriNetUnfolderBase]: 4649/7205 cut-off events. [2023-11-29 01:48:11,021 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 01:48:11,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14127 conditions, 7205 events. 4649/7205 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 48102 event pairs, 3706 based on Foata normal form. 0/4327 useless extension candidates. Maximal degree in co-relation 10414. Up to 4922 conditions per place. [2023-11-29 01:48:11,092 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 86 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-11-29 01:48:11,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 443 flow [2023-11-29 01:48:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:48:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:48:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2023-11-29 01:48:11,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573134328358209 [2023-11-29 01:48:11,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 192 transitions. [2023-11-29 01:48:11,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 192 transitions. [2023-11-29 01:48:11,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:11,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 192 transitions. [2023-11-29 01:48:11,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:11,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:11,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:11,099 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 154 flow. Second operand 5 states and 192 transitions. [2023-11-29 01:48:11,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 443 flow [2023-11-29 01:48:11,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 421 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 01:48:11,104 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 157 flow [2023-11-29 01:48:11,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-29 01:48:11,105 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-11-29 01:48:11,105 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 157 flow [2023-11-29 01:48:11,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:11,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:11,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 01:48:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:48:11,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:11,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash 441942625, now seen corresponding path program 1 times [2023-11-29 01:48:11,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:11,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883837287] [2023-11-29 01:48:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:11,189 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 01:48:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883837287] [2023-11-29 01:48:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883837287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089207143] [2023-11-29 01:48:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:11,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:11,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:11,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:48:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:11,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:48:11,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:11,332 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 01:48:11,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:11,374 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 01:48:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089207143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:11,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 01:48:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22529716] [2023-11-29 01:48:11,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:48:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:48:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:48:11,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-29 01:48:11,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 157 flow. Second operand has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:11,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:11,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-29 01:48:11,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:12,514 INFO L124 PetriNetUnfolderBase]: 4298/6750 cut-off events. [2023-11-29 01:48:12,515 INFO L125 PetriNetUnfolderBase]: For 1178/1299 co-relation queries the response was YES. [2023-11-29 01:48:12,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14056 conditions, 6750 events. 4298/6750 cut-off events. For 1178/1299 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 46844 event pairs, 3706 based on Foata normal form. 3/4048 useless extension candidates. Maximal degree in co-relation 9723. Up to 6198 conditions per place. [2023-11-29 01:48:12,546 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 40 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2023-11-29 01:48:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 293 flow [2023-11-29 01:48:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:48:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:48:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2023-11-29 01:48:12,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641791044776119 [2023-11-29 01:48:12,548 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 244 transitions. [2023-11-29 01:48:12,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 244 transitions. [2023-11-29 01:48:12,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:12,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 244 transitions. [2023-11-29 01:48:12,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 24.4) internal successors, (244), 10 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:12,552 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 01:48:12,553 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 01:48:12,553 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 157 flow. Second operand 10 states and 244 transitions. [2023-11-29 01:48:12,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 293 flow [2023-11-29 01:48:12,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:48:12,556 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 226 flow [2023-11-29 01:48:12,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=226, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-29 01:48:12,557 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-11-29 01:48:12,558 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 226 flow [2023-11-29 01:48:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:12,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:12,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:12,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:48:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:12,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:12,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1067595466, now seen corresponding path program 1 times [2023-11-29 01:48:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496065470] [2023-11-29 01:48:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:12,856 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 01:48:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496065470] [2023-11-29 01:48:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496065470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:12,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:12,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:48:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152591838] [2023-11-29 01:48:12,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:12,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:12,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2023-11-29 01:48:12,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:12,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:12,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2023-11-29 01:48:12,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:13,898 INFO L124 PetriNetUnfolderBase]: 3882/6120 cut-off events. [2023-11-29 01:48:13,899 INFO L125 PetriNetUnfolderBase]: For 705/866 co-relation queries the response was YES. [2023-11-29 01:48:13,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12490 conditions, 6120 events. 3882/6120 cut-off events. For 705/866 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 40559 event pairs, 3176 based on Foata normal form. 0/3663 useless extension candidates. Maximal degree in co-relation 12454. Up to 4975 conditions per place. [2023-11-29 01:48:13,944 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 81 selfloop transitions, 5 changer transitions 2/104 dead transitions. [2023-11-29 01:48:13,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 489 flow [2023-11-29 01:48:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:48:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:48:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-29 01:48:13,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-11-29 01:48:13,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-29 01:48:13,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-29 01:48:13,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:13,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-29 01:48:13,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:13,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:13,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:13,950 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 226 flow. Second operand 5 states and 180 transitions. [2023-11-29 01:48:13,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 489 flow [2023-11-29 01:48:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 478 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 01:48:13,955 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 240 flow [2023-11-29 01:48:13,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-11-29 01:48:13,956 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-11-29 01:48:13,956 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 240 flow [2023-11-29 01:48:13,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:13,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:13,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:13,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:48:13,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:13,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash -492322974, now seen corresponding path program 1 times [2023-11-29 01:48:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827947376] [2023-11-29 01:48:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:14,224 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 01:48:14,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827947376] [2023-11-29 01:48:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827947376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699055647] [2023-11-29 01:48:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:14,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:14,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:14,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:48:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:14,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:14,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:14,403 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 01:48:14,458 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 01:48:14,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:14,520 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 01:48:14,525 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 01:48:14,537 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 01:48:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699055647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:14,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:14,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 01:48:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389422373] [2023-11-29 01:48:14,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:48:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:48:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:48:14,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:14,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:14,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:14,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:14,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:16,112 INFO L124 PetriNetUnfolderBase]: 5414/9267 cut-off events. [2023-11-29 01:48:16,112 INFO L125 PetriNetUnfolderBase]: For 1539/1918 co-relation queries the response was YES. [2023-11-29 01:48:16,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18853 conditions, 9267 events. 5414/9267 cut-off events. For 1539/1918 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 72985 event pairs, 1736 based on Foata normal form. 0/5778 useless extension candidates. Maximal degree in co-relation 18815. Up to 2567 conditions per place. [2023-11-29 01:48:16,181 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 103 selfloop transitions, 16 changer transitions 1/137 dead transitions. [2023-11-29 01:48:16,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 137 transitions, 634 flow [2023-11-29 01:48:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:48:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:48:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2023-11-29 01:48:16,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223880597014925 [2023-11-29 01:48:16,184 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 280 transitions. [2023-11-29 01:48:16,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 280 transitions. [2023-11-29 01:48:16,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:16,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 280 transitions. [2023-11-29 01:48:16,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:16,187 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 01:48:16,188 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 01:48:16,188 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 240 flow. Second operand 8 states and 280 transitions. [2023-11-29 01:48:16,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 137 transitions, 634 flow [2023-11-29 01:48:16,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 629 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:48:16,195 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 308 flow [2023-11-29 01:48:16,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=308, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-11-29 01:48:16,196 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-11-29 01:48:16,196 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 308 flow [2023-11-29 01:48:16,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:16,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:16,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:16,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:48:16,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:16,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:16,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash -492322973, now seen corresponding path program 1 times [2023-11-29 01:48:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:16,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542494057] [2023-11-29 01:48:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:16,648 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 01:48:16,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542494057] [2023-11-29 01:48:16,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542494057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646098612] [2023-11-29 01:48:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:16,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:16,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:48:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:16,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:16,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:16,795 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 01:48:16,828 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 01:48:16,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:16,874 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 14 treesize of output 12 [2023-11-29 01:48:16,877 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 18 treesize of output 16 [2023-11-29 01:48:16,887 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 01:48:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646098612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:16,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 01:48:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912919649] [2023-11-29 01:48:16,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:16,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:48:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:48:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:48:16,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:16,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:16,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:16,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:16,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:18,090 INFO L124 PetriNetUnfolderBase]: 5060/8480 cut-off events. [2023-11-29 01:48:18,090 INFO L125 PetriNetUnfolderBase]: For 4743/5175 co-relation queries the response was YES. [2023-11-29 01:48:18,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20370 conditions, 8480 events. 5060/8480 cut-off events. For 4743/5175 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 62644 event pairs, 1616 based on Foata normal form. 0/5474 useless extension candidates. Maximal degree in co-relation 20329. Up to 2567 conditions per place. [2023-11-29 01:48:18,184 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 102 selfloop transitions, 16 changer transitions 1/136 dead transitions. [2023-11-29 01:48:18,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 682 flow [2023-11-29 01:48:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:48:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:48:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 279 transitions. [2023-11-29 01:48:18,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205223880597015 [2023-11-29 01:48:18,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 279 transitions. [2023-11-29 01:48:18,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 279 transitions. [2023-11-29 01:48:18,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:18,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 279 transitions. [2023-11-29 01:48:18,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 34.875) internal successors, (279), 8 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:18,188 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 01:48:18,188 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 01:48:18,188 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 308 flow. Second operand 8 states and 279 transitions. [2023-11-29 01:48:18,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 682 flow [2023-11-29 01:48:18,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 136 transitions, 665 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 01:48:18,193 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 319 flow [2023-11-29 01:48:18,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=319, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-29 01:48:18,194 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2023-11-29 01:48:18,194 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 319 flow [2023-11-29 01:48:18,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:18,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:18,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:18,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:48:18,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:18,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:18,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash -492322970, now seen corresponding path program 1 times [2023-11-29 01:48:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807005605] [2023-11-29 01:48:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:18,495 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 01:48:18,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:18,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807005605] [2023-11-29 01:48:18,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807005605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:18,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:18,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:48:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71670714] [2023-11-29 01:48:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:18,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:48:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:48:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:48:18,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:18,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:18,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:18,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:18,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:19,494 INFO L124 PetriNetUnfolderBase]: 4832/8620 cut-off events. [2023-11-29 01:48:19,494 INFO L125 PetriNetUnfolderBase]: For 6591/6906 co-relation queries the response was YES. [2023-11-29 01:48:19,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21056 conditions, 8620 events. 4832/8620 cut-off events. For 6591/6906 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 67817 event pairs, 1416 based on Foata normal form. 0/6046 useless extension candidates. Maximal degree in co-relation 21015. Up to 4563 conditions per place. [2023-11-29 01:48:19,533 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 80 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-29 01:48:19,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 534 flow [2023-11-29 01:48:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:48:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:48:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-11-29 01:48:19,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467661691542289 [2023-11-29 01:48:19,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-11-29 01:48:19,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-11-29 01:48:19,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:19,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-11-29 01:48:19,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,536 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 01:48:19,536 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 01:48:19,536 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 319 flow. Second operand 3 states and 130 transitions. [2023-11-29 01:48:19,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 534 flow [2023-11-29 01:48:19,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 519 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 01:48:19,543 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 300 flow [2023-11-29 01:48:19,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-11-29 01:48:19,544 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2023-11-29 01:48:19,544 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 300 flow [2023-11-29 01:48:19,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:19,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:19,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:48:19,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:19,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash 524212338, now seen corresponding path program 1 times [2023-11-29 01:48:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474064813] [2023-11-29 01:48:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:19,641 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 01:48:19,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474064813] [2023-11-29 01:48:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474064813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:19,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:19,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:48:19,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987723588] [2023-11-29 01:48:19,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:19,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:48:19,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:48:19,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:48:19,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:19,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:19,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:19,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:21,104 INFO L124 PetriNetUnfolderBase]: 6720/11419 cut-off events. [2023-11-29 01:48:21,104 INFO L125 PetriNetUnfolderBase]: For 9107/9715 co-relation queries the response was YES. [2023-11-29 01:48:21,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28639 conditions, 11419 events. 6720/11419 cut-off events. For 9107/9715 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 86997 event pairs, 2030 based on Foata normal form. 0/7974 useless extension candidates. Maximal degree in co-relation 28598. Up to 6943 conditions per place. [2023-11-29 01:48:21,163 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 86 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-11-29 01:48:21,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 616 flow [2023-11-29 01:48:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:48:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:48:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-11-29 01:48:21,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467661691542289 [2023-11-29 01:48:21,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-11-29 01:48:21,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-11-29 01:48:21,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:21,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-11-29 01:48:21,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:21,166 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 01:48:21,166 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 01:48:21,166 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 300 flow. Second operand 3 states and 130 transitions. [2023-11-29 01:48:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 616 flow [2023-11-29 01:48:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 106 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:48:21,172 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 323 flow [2023-11-29 01:48:21,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-29 01:48:21,173 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-11-29 01:48:21,173 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 323 flow [2023-11-29 01:48:21,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:21,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:21,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:21,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:48:21,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:21,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 524212336, now seen corresponding path program 1 times [2023-11-29 01:48:21,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147357667] [2023-11-29 01:48:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:21,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:21,246 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 01:48:21,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147357667] [2023-11-29 01:48:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147357667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:21,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:21,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:48:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990658038] [2023-11-29 01:48:21,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:21,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:21,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:21,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:21,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 67 [2023-11-29 01:48:21,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 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 01:48:21,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 67 [2023-11-29 01:48:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:22,561 INFO L124 PetriNetUnfolderBase]: 7116/10882 cut-off events. [2023-11-29 01:48:22,561 INFO L125 PetriNetUnfolderBase]: For 10050/10876 co-relation queries the response was YES. [2023-11-29 01:48:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 10882 events. 7116/10882 cut-off events. For 10050/10876 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 73511 event pairs, 6003 based on Foata normal form. 0/8061 useless extension candidates. Maximal degree in co-relation 30638. Up to 9960 conditions per place. [2023-11-29 01:48:22,622 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 53 selfloop transitions, 2 changer transitions 26/97 dead transitions. [2023-11-29 01:48:22,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 549 flow [2023-11-29 01:48:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:48:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:48:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2023-11-29 01:48:22,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014925373134328 [2023-11-29 01:48:22,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 168 transitions. [2023-11-29 01:48:22,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 168 transitions. [2023-11-29 01:48:22,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:22,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 168 transitions. [2023-11-29 01:48:22,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:22,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:22,625 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:22,626 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 323 flow. Second operand 5 states and 168 transitions. [2023-11-29 01:48:22,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 549 flow [2023-11-29 01:48:22,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 97 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:48:22,633 INFO L231 Difference]: Finished difference. Result has 93 places, 71 transitions, 302 flow [2023-11-29 01:48:22,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=93, PETRI_TRANSITIONS=71} [2023-11-29 01:48:22,633 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 25 predicate places. [2023-11-29 01:48:22,633 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 71 transitions, 302 flow [2023-11-29 01:48:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 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 01:48:22,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:22,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:48:22,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:22,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:22,634 INFO L85 PathProgramCache]: Analyzing trace with hash -675944152, now seen corresponding path program 1 times [2023-11-29 01:48:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:22,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480200504] [2023-11-29 01:48:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:22,682 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 01:48:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:22,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480200504] [2023-11-29 01:48:22,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480200504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:22,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:22,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:48:22,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678390349] [2023-11-29 01:48:22,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:48:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:48:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:48:22,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:48:22,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 71 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:22,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:22,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:48:22,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:24,184 INFO L124 PetriNetUnfolderBase]: 8111/12557 cut-off events. [2023-11-29 01:48:24,184 INFO L125 PetriNetUnfolderBase]: For 8401/9280 co-relation queries the response was YES. [2023-11-29 01:48:24,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34251 conditions, 12557 events. 8111/12557 cut-off events. For 8401/9280 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 90012 event pairs, 5591 based on Foata normal form. 404/10011 useless extension candidates. Maximal degree in co-relation 34221. Up to 9481 conditions per place. [2023-11-29 01:48:24,246 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 100 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-11-29 01:48:24,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 658 flow [2023-11-29 01:48:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:48:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:48:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2023-11-29 01:48:24,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007462686567164 [2023-11-29 01:48:24,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 161 transitions. [2023-11-29 01:48:24,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 161 transitions. [2023-11-29 01:48:24,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:24,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 161 transitions. [2023-11-29 01:48:24,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:24,250 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 01:48:24,250 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 01:48:24,250 INFO L175 Difference]: Start difference. First operand has 93 places, 71 transitions, 302 flow. Second operand 4 states and 161 transitions. [2023-11-29 01:48:24,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 658 flow [2023-11-29 01:48:24,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 620 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-29 01:48:24,307 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 301 flow [2023-11-29 01:48:24,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-11-29 01:48:24,307 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-11-29 01:48:24,308 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 301 flow [2023-11-29 01:48:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:24,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:24,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:24,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:48:24,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:24,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash -715172938, now seen corresponding path program 1 times [2023-11-29 01:48:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:24,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409987929] [2023-11-29 01:48:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:24,534 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 01:48:24,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409987929] [2023-11-29 01:48:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409987929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204189805] [2023-11-29 01:48:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:24,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:24,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:48:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:24,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:24,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:24,677 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 01:48:24,720 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 01:48:24,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:24,780 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 14 treesize of output 12 [2023-11-29 01:48:24,784 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 18 treesize of output 16 [2023-11-29 01:48:24,793 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 01:48:24,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204189805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:24,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:24,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 01:48:24,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424079274] [2023-11-29 01:48:24,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:24,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:48:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:48:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:48:24,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:26,595 INFO L124 PetriNetUnfolderBase]: 8286/13827 cut-off events. [2023-11-29 01:48:26,595 INFO L125 PetriNetUnfolderBase]: For 12608/12608 co-relation queries the response was YES. [2023-11-29 01:48:26,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36329 conditions, 13827 events. 8286/13827 cut-off events. For 12608/12608 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 109165 event pairs, 2252 based on Foata normal form. 0/10518 useless extension candidates. Maximal degree in co-relation 36295. Up to 4396 conditions per place. [2023-11-29 01:48:26,693 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 94 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2023-11-29 01:48:26,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 767 flow [2023-11-29 01:48:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:48:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:48:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2023-11-29 01:48:26,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47947761194029853 [2023-11-29 01:48:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 257 transitions. [2023-11-29 01:48:26,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 257 transitions. [2023-11-29 01:48:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 257 transitions. [2023-11-29 01:48:26,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:26,698 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 01:48:26,698 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 01:48:26,698 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 301 flow. Second operand 8 states and 257 transitions. [2023-11-29 01:48:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 767 flow [2023-11-29 01:48:26,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:48:26,703 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 370 flow [2023-11-29 01:48:26,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-11-29 01:48:26,704 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2023-11-29 01:48:26,704 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 370 flow [2023-11-29 01:48:26,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:26,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:26,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:26,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:48:26,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:48:26,905 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:26,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash -715172939, now seen corresponding path program 1 times [2023-11-29 01:48:26,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:26,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5865238] [2023-11-29 01:48:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:27,070 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 01:48:27,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5865238] [2023-11-29 01:48:27,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5865238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684799969] [2023-11-29 01:48:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:27,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:27,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:27,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:27,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:48:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:27,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:27,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:27,223 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 01:48:27,269 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 01:48:27,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:27,328 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 01:48:27,331 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 01:48:27,342 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 01:48:27,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684799969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:27,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:27,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 01:48:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58515661] [2023-11-29 01:48:27,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:27,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:48:27,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:48:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:48:27,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:48:27,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 370 flow. Second operand has 11 states, 11 states have (on average 22.818181818181817) internal successors, (251), 11 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:27,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:27,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:48:27,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:29,466 INFO L124 PetriNetUnfolderBase]: 7486/12457 cut-off events. [2023-11-29 01:48:29,467 INFO L125 PetriNetUnfolderBase]: For 13444/13444 co-relation queries the response was YES. [2023-11-29 01:48:29,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37091 conditions, 12457 events. 7486/12457 cut-off events. For 13444/13444 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 95477 event pairs, 2102 based on Foata normal form. 334/9835 useless extension candidates. Maximal degree in co-relation 37052. Up to 4210 conditions per place. [2023-11-29 01:48:29,578 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 93 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2023-11-29 01:48:29,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 126 transitions, 800 flow [2023-11-29 01:48:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:48:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 01:48:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2023-11-29 01:48:29,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2023-11-29 01:48:29,581 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 256 transitions. [2023-11-29 01:48:29,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 256 transitions. [2023-11-29 01:48:29,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:29,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 256 transitions. [2023-11-29 01:48:29,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:29,583 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 01:48:29,584 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 01:48:29,584 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 370 flow. Second operand 8 states and 256 transitions. [2023-11-29 01:48:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 126 transitions, 800 flow [2023-11-29 01:48:29,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 126 transitions, 790 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 01:48:29,592 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 386 flow [2023-11-29 01:48:29,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2023-11-29 01:48:29,593 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2023-11-29 01:48:29,593 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 386 flow [2023-11-29 01:48:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.818181818181817) internal successors, (251), 11 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:29,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:29,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:29,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:48:29,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:48:29,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:29,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash -86395237, now seen corresponding path program 1 times [2023-11-29 01:48:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090983473] [2023-11-29 01:48:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:29,854 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 01:48:29,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090983473] [2023-11-29 01:48:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090983473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:29,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:29,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:48:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142807913] [2023-11-29 01:48:29,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:29,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:48:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:48:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:48:29,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:48:29,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:29,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:29,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:48:29,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:32,069 INFO L124 PetriNetUnfolderBase]: 9678/14749 cut-off events. [2023-11-29 01:48:32,069 INFO L125 PetriNetUnfolderBase]: For 19819/19819 co-relation queries the response was YES. [2023-11-29 01:48:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46891 conditions, 14749 events. 9678/14749 cut-off events. For 19819/19819 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 105014 event pairs, 4720 based on Foata normal form. 460/12047 useless extension candidates. Maximal degree in co-relation 46852. Up to 9668 conditions per place. [2023-11-29 01:48:32,176 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 108 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2023-11-29 01:48:32,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 830 flow [2023-11-29 01:48:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:48:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:48:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-29 01:48:32,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082089552238806 [2023-11-29 01:48:32,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-29 01:48:32,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-29 01:48:32,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:32,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-29 01:48:32,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:32,179 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 01:48:32,179 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 01:48:32,180 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 386 flow. Second operand 4 states and 163 transitions. [2023-11-29 01:48:32,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 830 flow [2023-11-29 01:48:32,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 817 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 01:48:32,190 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 394 flow [2023-11-29 01:48:32,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2023-11-29 01:48:32,191 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2023-11-29 01:48:32,191 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 394 flow [2023-11-29 01:48:32,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:32,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:32,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 01:48:32,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:32,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -100152718, now seen corresponding path program 1 times [2023-11-29 01:48:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26643857] [2023-11-29 01:48:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:32,547 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 01:48:32,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:32,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26643857] [2023-11-29 01:48:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26643857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:32,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439202750] [2023-11-29 01:48:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:32,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:32,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:32,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:48:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:32,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:48:32,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:32,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 01:48:33,106 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 01:48:33,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:33,466 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 01:48:33,471 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 16 [2023-11-29 01:48:33,526 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 01:48:33,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439202750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:33,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:33,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 01:48:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590328633] [2023-11-29 01:48:33,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:48:33,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:48:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:48:33,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:48:33,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 394 flow. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:33,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:33,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:48:33,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:41,824 INFO L124 PetriNetUnfolderBase]: 30401/47264 cut-off events. [2023-11-29 01:48:41,824 INFO L125 PetriNetUnfolderBase]: For 78355/78355 co-relation queries the response was YES. [2023-11-29 01:48:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157087 conditions, 47264 events. 30401/47264 cut-off events. For 78355/78355 co-relation queries the response was YES. Maximal size of possible extension queue 2413. Compared 395273 event pairs, 11478 based on Foata normal form. 0/35334 useless extension candidates. Maximal degree in co-relation 157048. Up to 9723 conditions per place. [2023-11-29 01:48:42,177 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 302 selfloop transitions, 35 changer transitions 0/354 dead transitions. [2023-11-29 01:48:42,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 354 transitions, 2630 flow [2023-11-29 01:48:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:48:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:48:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 528 transitions. [2023-11-29 01:48:42,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253731343283582 [2023-11-29 01:48:42,180 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 528 transitions. [2023-11-29 01:48:42,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 528 transitions. [2023-11-29 01:48:42,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:42,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 528 transitions. [2023-11-29 01:48:42,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 35.2) internal successors, (528), 15 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,184 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,184 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 394 flow. Second operand 15 states and 528 transitions. [2023-11-29 01:48:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 354 transitions, 2630 flow [2023-11-29 01:48:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 354 transitions, 2576 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:48:42,240 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 594 flow [2023-11-29 01:48:42,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=594, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2023-11-29 01:48:42,241 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 44 predicate places. [2023-11-29 01:48:42,241 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 594 flow [2023-11-29 01:48:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:42,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:42,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:48:42,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:48:42,442 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:42,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -100152719, now seen corresponding path program 1 times [2023-11-29 01:48:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:42,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498472464] [2023-11-29 01:48:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:42,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:42,760 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 01:48:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:42,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498472464] [2023-11-29 01:48:42,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498472464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:42,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979065868] [2023-11-29 01:48:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:42,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:42,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:42,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:42,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:48:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:42,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:48:42,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:43,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 01:48:43,421 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 01:48:43,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:43,685 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 20 treesize of output 18 [2023-11-29 01:48:43,690 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 26 treesize of output 20 [2023-11-29 01:48:43,734 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 01:48:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979065868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:43,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:43,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 01:48:43,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986150904] [2023-11-29 01:48:43,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:43,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:48:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:48:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:48:43,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:48:43,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 594 flow. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:43,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:43,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:48:43,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:48:51,602 INFO L124 PetriNetUnfolderBase]: 29295/45782 cut-off events. [2023-11-29 01:48:51,603 INFO L125 PetriNetUnfolderBase]: For 73242/73242 co-relation queries the response was YES. [2023-11-29 01:48:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167314 conditions, 45782 events. 29295/45782 cut-off events. For 73242/73242 co-relation queries the response was YES. Maximal size of possible extension queue 2335. Compared 383420 event pairs, 11478 based on Foata normal form. 588/36166 useless extension candidates. Maximal degree in co-relation 167266. Up to 9593 conditions per place. [2023-11-29 01:48:52,056 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 300 selfloop transitions, 35 changer transitions 0/352 dead transitions. [2023-11-29 01:48:52,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 352 transitions, 2718 flow [2023-11-29 01:48:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:48:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:48:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 526 transitions. [2023-11-29 01:48:52,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233830845771145 [2023-11-29 01:48:52,059 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 526 transitions. [2023-11-29 01:48:52,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 526 transitions. [2023-11-29 01:48:52,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:48:52,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 526 transitions. [2023-11-29 01:48:52,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 35.06666666666667) internal successors, (526), 15 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:52,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:52,065 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:52,065 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 594 flow. Second operand 15 states and 526 transitions. [2023-11-29 01:48:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 352 transitions, 2718 flow [2023-11-29 01:48:52,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 352 transitions, 2709 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 01:48:52,480 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 659 flow [2023-11-29 01:48:52,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=659, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2023-11-29 01:48:52,480 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2023-11-29 01:48:52,481 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 659 flow [2023-11-29 01:48:52,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:52,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:48:52,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:52,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:48:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:48:52,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:48:52,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2050274269, now seen corresponding path program 1 times [2023-11-29 01:48:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556811282] [2023-11-29 01:48:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:52,848 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 01:48:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556811282] [2023-11-29 01:48:52,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556811282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098869540] [2023-11-29 01:48:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:52,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:52,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:48:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:52,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:48:52,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:53,084 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 01:48:53,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:53,183 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 01:48:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098869540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:53,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:53,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 01:48:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080062788] [2023-11-29 01:48:53,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:53,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:48:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:48:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:48:53,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:48:53,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 659 flow. Second operand has 20 states, 20 states have (on average 16.55) internal successors, (331), 20 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:53,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:48:53,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:48:53,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:00,574 INFO L124 PetriNetUnfolderBase]: 30243/46166 cut-off events. [2023-11-29 01:49:00,574 INFO L125 PetriNetUnfolderBase]: For 96608/98674 co-relation queries the response was YES. [2023-11-29 01:49:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175447 conditions, 46166 events. 30243/46166 cut-off events. For 96608/98674 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 366063 event pairs, 21944 based on Foata normal form. 738/37404 useless extension candidates. Maximal degree in co-relation 175397. Up to 32342 conditions per place. [2023-11-29 01:49:00,950 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 205 selfloop transitions, 16 changer transitions 0/236 dead transitions. [2023-11-29 01:49:00,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 236 transitions, 1878 flow [2023-11-29 01:49:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:49:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:49:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 295 transitions. [2023-11-29 01:49:00,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44029850746268656 [2023-11-29 01:49:00,952 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 295 transitions. [2023-11-29 01:49:00,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 295 transitions. [2023-11-29 01:49:00,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:00,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 295 transitions. [2023-11-29 01:49:00,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:00,955 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 01:49:00,955 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 01:49:00,955 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 659 flow. Second operand 10 states and 295 transitions. [2023-11-29 01:49:00,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 236 transitions, 1878 flow [2023-11-29 01:49:01,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 236 transitions, 1818 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-11-29 01:49:01,200 INFO L231 Difference]: Finished difference. Result has 126 places, 109 transitions, 712 flow [2023-11-29 01:49:01,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2023-11-29 01:49:01,201 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 58 predicate places. [2023-11-29 01:49:01,201 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 712 flow [2023-11-29 01:49:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.55) internal successors, (331), 20 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:01,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:01,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:01,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:49:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:49:01,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:01,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1757450185, now seen corresponding path program 1 times [2023-11-29 01:49:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989775947] [2023-11-29 01:49:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:01,460 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 01:49:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989775947] [2023-11-29 01:49:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989775947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464862652] [2023-11-29 01:49:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:49:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:49:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:49:01,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:49:01,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:01,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:01,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:49:01,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:07,053 INFO L124 PetriNetUnfolderBase]: 26181/39543 cut-off events. [2023-11-29 01:49:07,053 INFO L125 PetriNetUnfolderBase]: For 97120/98455 co-relation queries the response was YES. [2023-11-29 01:49:07,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155886 conditions, 39543 events. 26181/39543 cut-off events. For 97120/98455 co-relation queries the response was YES. Maximal size of possible extension queue 1868. Compared 311382 event pairs, 4919 based on Foata normal form. 1415/34247 useless extension candidates. Maximal degree in co-relation 155832. Up to 22212 conditions per place. [2023-11-29 01:49:07,437 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 141 selfloop transitions, 15 changer transitions 0/175 dead transitions. [2023-11-29 01:49:07,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1480 flow [2023-11-29 01:49:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:49:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:49:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2023-11-29 01:49:07,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164179104477612 [2023-11-29 01:49:07,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 173 transitions. [2023-11-29 01:49:07,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 173 transitions. [2023-11-29 01:49:07,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:07,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 173 transitions. [2023-11-29 01:49:07,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:07,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:07,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:07,441 INFO L175 Difference]: Start difference. First operand has 126 places, 109 transitions, 712 flow. Second operand 5 states and 173 transitions. [2023-11-29 01:49:07,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1480 flow [2023-11-29 01:49:07,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 175 transitions, 1444 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-29 01:49:07,609 INFO L231 Difference]: Finished difference. Result has 123 places, 108 transitions, 708 flow [2023-11-29 01:49:07,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=123, PETRI_TRANSITIONS=108} [2023-11-29 01:49:07,610 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2023-11-29 01:49:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 108 transitions, 708 flow [2023-11-29 01:49:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:07,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:07,610 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 01:49:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 01:49:07,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:07,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2036512673, now seen corresponding path program 2 times [2023-11-29 01:49:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493848753] [2023-11-29 01:49:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:07,718 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 01:49:07,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493848753] [2023-11-29 01:49:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493848753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96123847] [2023-11-29 01:49:07,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:49:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:07,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:07,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:49:07,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:49:07,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:49:07,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:49:07,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:07,876 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 01:49:07,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:07,901 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 01:49:07,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96123847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:07,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:07,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 01:49:07,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807860981] [2023-11-29 01:49:07,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:49:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:49:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:49:07,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-29 01:49:07,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 108 transitions, 708 flow. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:07,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:07,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-29 01:49:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:13,010 INFO L124 PetriNetUnfolderBase]: 21230/32788 cut-off events. [2023-11-29 01:49:13,010 INFO L125 PetriNetUnfolderBase]: For 88578/90177 co-relation queries the response was YES. [2023-11-29 01:49:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133881 conditions, 32788 events. 21230/32788 cut-off events. For 88578/90177 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 262419 event pairs, 17397 based on Foata normal form. 465/26716 useless extension candidates. Maximal degree in co-relation 133816. Up to 29873 conditions per place. [2023-11-29 01:49:13,446 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 72 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-11-29 01:49:13,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 110 transitions, 908 flow [2023-11-29 01:49:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:49:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:49:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 320 transitions. [2023-11-29 01:49:13,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411513859275053 [2023-11-29 01:49:13,448 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 320 transitions. [2023-11-29 01:49:13,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 320 transitions. [2023-11-29 01:49:13,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:13,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 320 transitions. [2023-11-29 01:49:13,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 22.857142857142858) internal successors, (320), 14 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 01:49:13,450 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 01:49:13,450 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 01:49:13,450 INFO L175 Difference]: Start difference. First operand has 123 places, 108 transitions, 708 flow. Second operand 14 states and 320 transitions. [2023-11-29 01:49:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 110 transitions, 908 flow [2023-11-29 01:49:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 110 transitions, 864 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-29 01:49:13,603 INFO L231 Difference]: Finished difference. Result has 127 places, 110 transitions, 720 flow [2023-11-29 01:49:13,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=720, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2023-11-29 01:49:13,604 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 59 predicate places. [2023-11-29 01:49:13,604 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 720 flow [2023-11-29 01:49:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:13,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:13,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:13,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:49:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:13,805 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:13,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1137549623, now seen corresponding path program 1 times [2023-11-29 01:49:13,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:13,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933714073] [2023-11-29 01:49:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:13,928 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 01:49:13,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933714073] [2023-11-29 01:49:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933714073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535960969] [2023-11-29 01:49:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:13,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:13,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:13,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:49:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:14,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:49:14,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:14,165 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 01:49:14,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:14,251 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 01:49:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535960969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:14,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-29 01:49:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126863018] [2023-11-29 01:49:14,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:49:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:49:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:49:14,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2023-11-29 01:49:14,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 110 transitions, 720 flow. Second operand has 20 states, 20 states have (on average 18.65) internal successors, (373), 20 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:14,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:14,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2023-11-29 01:49:14,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:21,017 INFO L124 PetriNetUnfolderBase]: 29316/46332 cut-off events. [2023-11-29 01:49:21,017 INFO L125 PetriNetUnfolderBase]: For 99793/100884 co-relation queries the response was YES. [2023-11-29 01:49:21,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175689 conditions, 46332 events. 29316/46332 cut-off events. For 99793/100884 co-relation queries the response was YES. Maximal size of possible extension queue 1930. Compared 375727 event pairs, 18821 based on Foata normal form. 437/38174 useless extension candidates. Maximal degree in co-relation 126421. Up to 29886 conditions per place. [2023-11-29 01:49:21,398 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 202 selfloop transitions, 22 changer transitions 3/243 dead transitions. [2023-11-29 01:49:21,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 243 transitions, 1941 flow [2023-11-29 01:49:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:49:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 01:49:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 373 transitions. [2023-11-29 01:49:21,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639303482587065 [2023-11-29 01:49:21,399 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 373 transitions. [2023-11-29 01:49:21,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 373 transitions. [2023-11-29 01:49:21,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:21,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 373 transitions. [2023-11-29 01:49:21,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 31.083333333333332) internal successors, (373), 12 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:21,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:21,401 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:21,401 INFO L175 Difference]: Start difference. First operand has 127 places, 110 transitions, 720 flow. Second operand 12 states and 373 transitions. [2023-11-29 01:49:21,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 243 transitions, 1941 flow [2023-11-29 01:49:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 243 transitions, 1875 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-29 01:49:21,516 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 795 flow [2023-11-29 01:49:21,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=795, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2023-11-29 01:49:21,516 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 64 predicate places. [2023-11-29 01:49:21,516 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 795 flow [2023-11-29 01:49:21,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.65) internal successors, (373), 20 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:21,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:21,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:21,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:49:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:21,717 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:21,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1352881393, now seen corresponding path program 2 times [2023-11-29 01:49:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050078161] [2023-11-29 01:49:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:21,844 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 01:49:21,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:21,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050078161] [2023-11-29 01:49:21,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050078161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169511099] [2023-11-29 01:49:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:49:21,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:21,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:21,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:21,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:49:21,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:49:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:49:22,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:49:22,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:22,014 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 01:49:22,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169511099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:22,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:49:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2023-11-29 01:49:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782254123] [2023-11-29 01:49:22,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:22,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:49:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:49:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 795 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:22,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:22,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:49:22,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:26,081 INFO L124 PetriNetUnfolderBase]: 16707/27279 cut-off events. [2023-11-29 01:49:26,081 INFO L125 PetriNetUnfolderBase]: For 83448/85611 co-relation queries the response was YES. [2023-11-29 01:49:26,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107392 conditions, 27279 events. 16707/27279 cut-off events. For 83448/85611 co-relation queries the response was YES. Maximal size of possible extension queue 1312. Compared 224283 event pairs, 13480 based on Foata normal form. 620/24440 useless extension candidates. Maximal degree in co-relation 82317. Up to 23660 conditions per place. [2023-11-29 01:49:26,314 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 90 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-29 01:49:26,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 112 transitions, 924 flow [2023-11-29 01:49:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:49:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-29 01:49:26,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024875621890548 [2023-11-29 01:49:26,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-29 01:49:26,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-29 01:49:26,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:26,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-29 01:49:26,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:26,316 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 01:49:26,316 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 01:49:26,316 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 795 flow. Second operand 3 states and 101 transitions. [2023-11-29 01:49:26,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 112 transitions, 924 flow [2023-11-29 01:49:26,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 112 transitions, 909 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 01:49:26,392 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 729 flow [2023-11-29 01:49:26,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=729, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2023-11-29 01:49:26,393 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 60 predicate places. [2023-11-29 01:49:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 729 flow [2023-11-29 01:49:26,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:26,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:26,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:49:26,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:26,593 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:26,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash 927159786, now seen corresponding path program 1 times [2023-11-29 01:49:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:26,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125844957] [2023-11-29 01:49:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:26,725 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 01:49:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125844957] [2023-11-29 01:49:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125844957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61036868] [2023-11-29 01:49:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:26,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:26,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:49:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:26,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:49:26,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:27,032 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 01:49:27,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:27,130 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 01:49:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61036868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:27,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:27,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 01:49:27,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271464778] [2023-11-29 01:49:27,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:49:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:49:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:49:27,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2023-11-29 01:49:27,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 729 flow. Second operand has 21 states, 21 states have (on average 18.571428571428573) internal successors, (390), 21 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:27,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:27,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2023-11-29 01:49:27,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:32,791 INFO L124 PetriNetUnfolderBase]: 24896/40260 cut-off events. [2023-11-29 01:49:32,791 INFO L125 PetriNetUnfolderBase]: For 109929/110914 co-relation queries the response was YES. [2023-11-29 01:49:32,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155981 conditions, 40260 events. 24896/40260 cut-off events. For 109929/110914 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 329184 event pairs, 17775 based on Foata normal form. 599/35490 useless extension candidates. Maximal degree in co-relation 155947. Up to 24056 conditions per place. [2023-11-29 01:49:33,140 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 165 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2023-11-29 01:49:33,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 1736 flow [2023-11-29 01:49:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:49:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 01:49:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 329 transitions. [2023-11-29 01:49:33,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44640434192673 [2023-11-29 01:49:33,142 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 329 transitions. [2023-11-29 01:49:33,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 329 transitions. [2023-11-29 01:49:33,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:33,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 329 transitions. [2023-11-29 01:49:33,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 29.90909090909091) internal successors, (329), 11 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:33,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:33,144 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:33,144 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 729 flow. Second operand 11 states and 329 transitions. [2023-11-29 01:49:33,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 1736 flow [2023-11-29 01:49:33,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 210 transitions, 1735 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:49:33,285 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 926 flow [2023-11-29 01:49:33,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=926, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-11-29 01:49:33,286 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 73 predicate places. [2023-11-29 01:49:33,286 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 926 flow [2023-11-29 01:49:33,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.571428571428573) internal successors, (390), 21 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:33,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:33,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:33,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:49:33,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:33,487 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:33,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1352881394, now seen corresponding path program 2 times [2023-11-29 01:49:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:33,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152205966] [2023-11-29 01:49:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:33,594 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 01:49:33,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152205966] [2023-11-29 01:49:33,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152205966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:33,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84485260] [2023-11-29 01:49:33,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:49:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:33,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:33,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:49:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:49:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:49:33,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:49:33,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:33,728 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 01:49:33,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84485260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:33,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:49:33,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2023-11-29 01:49:33,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124075303] [2023-11-29 01:49:33,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:49:33,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:49:33,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 926 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:33,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:33,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:49:33,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:36,878 INFO L124 PetriNetUnfolderBase]: 13535/22924 cut-off events. [2023-11-29 01:49:36,878 INFO L125 PetriNetUnfolderBase]: For 83873/85898 co-relation queries the response was YES. [2023-11-29 01:49:36,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90560 conditions, 22924 events. 13535/22924 cut-off events. For 83873/85898 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 190067 event pairs, 10412 based on Foata normal form. 582/22291 useless extension candidates. Maximal degree in co-relation 90521. Up to 19240 conditions per place. [2023-11-29 01:49:37,098 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 92 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-29 01:49:37,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 115 transitions, 1059 flow [2023-11-29 01:49:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:49:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-29 01:49:37,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925373134328358 [2023-11-29 01:49:37,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-29 01:49:37,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-29 01:49:37,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:37,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-29 01:49:37,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:49:37,100 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 01:49:37,100 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 01:49:37,100 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 926 flow. Second operand 3 states and 99 transitions. [2023-11-29 01:49:37,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 115 transitions, 1059 flow [2023-11-29 01:49:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 115 transitions, 1013 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-29 01:49:37,174 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 829 flow [2023-11-29 01:49:37,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=829, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2023-11-29 01:49:37,174 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 67 predicate places. [2023-11-29 01:49:37,174 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 829 flow [2023-11-29 01:49:37,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:37,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:37,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:37,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:49:37,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:37,375 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:37,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1353620005, now seen corresponding path program 1 times [2023-11-29 01:49:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469493848] [2023-11-29 01:49:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:37,471 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 01:49:37,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469493848] [2023-11-29 01:49:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469493848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068398579] [2023-11-29 01:49:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:37,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:37,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:49:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:37,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:49:37,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:37,716 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 01:49:37,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:37,819 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 01:49:37,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068398579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:37,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:37,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 01:49:37,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864538172] [2023-11-29 01:49:37,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:37,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:49:37,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:49:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:49:37,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:49:37,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 829 flow. Second operand has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:37,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:37,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:49:37,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:42,825 INFO L124 PetriNetUnfolderBase]: 19990/30092 cut-off events. [2023-11-29 01:49:42,825 INFO L125 PetriNetUnfolderBase]: For 104713/106451 co-relation queries the response was YES. [2023-11-29 01:49:42,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122403 conditions, 30092 events. 19990/30092 cut-off events. For 104713/106451 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 220378 event pairs, 10433 based on Foata normal form. 1145/29187 useless extension candidates. Maximal degree in co-relation 122364. Up to 8807 conditions per place. [2023-11-29 01:49:43,109 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 240 selfloop transitions, 34 changer transitions 2/292 dead transitions. [2023-11-29 01:49:43,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 292 transitions, 2531 flow [2023-11-29 01:49:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:49:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:49:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 405 transitions. [2023-11-29 01:49:43,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43176972281449894 [2023-11-29 01:49:43,111 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 405 transitions. [2023-11-29 01:49:43,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 405 transitions. [2023-11-29 01:49:43,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:43,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 405 transitions. [2023-11-29 01:49:43,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 28.928571428571427) internal successors, (405), 14 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:43,112 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 01:49:43,112 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 01:49:43,112 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 829 flow. Second operand 14 states and 405 transitions. [2023-11-29 01:49:43,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 292 transitions, 2531 flow [2023-11-29 01:49:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 292 transitions, 2530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:49:43,295 INFO L231 Difference]: Finished difference. Result has 152 places, 120 transitions, 961 flow [2023-11-29 01:49:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=961, PETRI_PLACES=152, PETRI_TRANSITIONS=120} [2023-11-29 01:49:43,295 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 84 predicate places. [2023-11-29 01:49:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 120 transitions, 961 flow [2023-11-29 01:49:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:43,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:43,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:43,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:49:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:49:43,496 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:43,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1114224713, now seen corresponding path program 1 times [2023-11-29 01:49:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773702958] [2023-11-29 01:49:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:43,603 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 01:49:43,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773702958] [2023-11-29 01:49:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773702958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644072329] [2023-11-29 01:49:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:43,604 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:49:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:43,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:49:43,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:43,827 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 01:49:43,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:43,920 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 01:49:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644072329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:43,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:43,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 01:49:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137732933] [2023-11-29 01:49:43,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:43,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:49:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:49:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:49:44,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:49:44,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 120 transitions, 961 flow. Second operand has 21 states, 21 states have (on average 16.714285714285715) internal successors, (351), 21 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:44,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:44,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:49:44,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:49,223 INFO L124 PetriNetUnfolderBase]: 19823/30824 cut-off events. [2023-11-29 01:49:49,224 INFO L125 PetriNetUnfolderBase]: For 119014/123008 co-relation queries the response was YES. [2023-11-29 01:49:49,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127434 conditions, 30824 events. 19823/30824 cut-off events. For 119014/123008 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 234471 event pairs, 14086 based on Foata normal form. 1218/30368 useless extension candidates. Maximal degree in co-relation 127389. Up to 22323 conditions per place. [2023-11-29 01:49:49,499 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 131 selfloop transitions, 24 changer transitions 23/197 dead transitions. [2023-11-29 01:49:49,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 197 transitions, 1843 flow [2023-11-29 01:49:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:49:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:49:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2023-11-29 01:49:49,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970149253731343 [2023-11-29 01:49:49,501 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 266 transitions. [2023-11-29 01:49:49,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 266 transitions. [2023-11-29 01:49:49,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:49,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 266 transitions. [2023-11-29 01:49:49,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:49,502 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 01:49:49,502 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 01:49:49,502 INFO L175 Difference]: Start difference. First operand has 152 places, 120 transitions, 961 flow. Second operand 10 states and 266 transitions. [2023-11-29 01:49:49,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 197 transitions, 1843 flow [2023-11-29 01:49:49,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 1799 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-29 01:49:49,744 INFO L231 Difference]: Finished difference. Result has 156 places, 114 transitions, 889 flow [2023-11-29 01:49:49,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=156, PETRI_TRANSITIONS=114} [2023-11-29 01:49:49,745 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 88 predicate places. [2023-11-29 01:49:49,745 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 114 transitions, 889 flow [2023-11-29 01:49:49,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 16.714285714285715) internal successors, (351), 21 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:49,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:49,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:49,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:49:49,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:49,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:49,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash 55629023, now seen corresponding path program 2 times [2023-11-29 01:49:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:49,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967478818] [2023-11-29 01:49:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:49:50,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967478818] [2023-11-29 01:49:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967478818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:50,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:50,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:49:50,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944268871] [2023-11-29 01:49:50,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:50,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:50,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:49:50,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 114 transitions, 889 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:50,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:49:50,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:53,001 INFO L124 PetriNetUnfolderBase]: 11190/19018 cut-off events. [2023-11-29 01:49:53,001 INFO L125 PetriNetUnfolderBase]: For 80261/81877 co-relation queries the response was YES. [2023-11-29 01:49:53,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79155 conditions, 19018 events. 11190/19018 cut-off events. For 80261/81877 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 153891 event pairs, 8772 based on Foata normal form. 431/18567 useless extension candidates. Maximal degree in co-relation 79108. Up to 15992 conditions per place. [2023-11-29 01:49:53,166 INFO L140 encePairwiseOnDemand]: 65/67 looper letters, 86 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-11-29 01:49:53,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 113 transitions, 1056 flow [2023-11-29 01:49:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:49:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-29 01:49:53,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48258706467661694 [2023-11-29 01:49:53,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-29 01:49:53,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-29 01:49:53,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:53,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-29 01:49:53,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:49:53,168 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 01:49:53,168 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 01:49:53,168 INFO L175 Difference]: Start difference. First operand has 156 places, 114 transitions, 889 flow. Second operand 3 states and 97 transitions. [2023-11-29 01:49:53,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 113 transitions, 1056 flow [2023-11-29 01:49:53,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 113 transitions, 1013 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-29 01:49:53,271 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 841 flow [2023-11-29 01:49:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=841, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2023-11-29 01:49:53,272 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 78 predicate places. [2023-11-29 01:49:53,272 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 841 flow [2023-11-29 01:49:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:53,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:53,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 01:49:53,272 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:53,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 55629024, now seen corresponding path program 1 times [2023-11-29 01:49:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079336700] [2023-11-29 01:49:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:49:53,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:53,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079336700] [2023-11-29 01:49:53,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079336700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:53,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:53,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:49:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828886148] [2023-11-29 01:49:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:53,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:53,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-29 01:49:53,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 841 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:53,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:53,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-29 01:49:53,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:49:55,696 INFO L124 PetriNetUnfolderBase]: 10430/17714 cut-off events. [2023-11-29 01:49:55,697 INFO L125 PetriNetUnfolderBase]: For 74366/75918 co-relation queries the response was YES. [2023-11-29 01:49:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73291 conditions, 17714 events. 10430/17714 cut-off events. For 74366/75918 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 141778 event pairs, 8136 based on Foata normal form. 429/17569 useless extension candidates. Maximal degree in co-relation 73246. Up to 14932 conditions per place. [2023-11-29 01:49:55,863 INFO L140 encePairwiseOnDemand]: 65/67 looper letters, 85 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-29 01:49:55,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 112 transitions, 1006 flow [2023-11-29 01:49:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:49:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2023-11-29 01:49:55,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2023-11-29 01:49:55,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 96 transitions. [2023-11-29 01:49:55,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 96 transitions. [2023-11-29 01:49:55,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:49:55,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 96 transitions. [2023-11-29 01:49:55,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:49:55,864 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 01:49:55,864 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 01:49:55,864 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 841 flow. Second operand 3 states and 96 transitions. [2023-11-29 01:49:55,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 112 transitions, 1006 flow [2023-11-29 01:49:55,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 112 transitions, 1005 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:49:55,964 INFO L231 Difference]: Finished difference. Result has 146 places, 112 transitions, 835 flow [2023-11-29 01:49:55,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=835, PETRI_PLACES=146, PETRI_TRANSITIONS=112} [2023-11-29 01:49:55,964 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 78 predicate places. [2023-11-29 01:49:55,964 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 112 transitions, 835 flow [2023-11-29 01:49:55,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:55,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:49:55,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:55,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 01:49:55,965 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:49:55,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash 55629021, now seen corresponding path program 1 times [2023-11-29 01:49:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556810036] [2023-11-29 01:49:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:56,299 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 01:49:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556810036] [2023-11-29 01:49:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556810036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:49:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662004443] [2023-11-29 01:49:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:56,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:56,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:56,300 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:56,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:49:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:56,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:49:56,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:56,497 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 01:49:56,598 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 01:49:56,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:56,703 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 01:49:56,705 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 20 treesize of output 16 [2023-11-29 01:49:56,711 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 01:49:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662004443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:56,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:49:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 01:49:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829572245] [2023-11-29 01:49:56,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:56,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:49:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:49:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:49:56,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2023-11-29 01:49:56,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 112 transitions, 835 flow. Second operand has 23 states, 23 states have (on average 17.434782608695652) internal successors, (401), 23 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:49:56,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:49:56,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2023-11-29 01:49:56,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:50:01,783 INFO L124 PetriNetUnfolderBase]: 18684/29167 cut-off events. [2023-11-29 01:50:01,783 INFO L125 PetriNetUnfolderBase]: For 112169/116114 co-relation queries the response was YES. [2023-11-29 01:50:01,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117777 conditions, 29167 events. 18684/29167 cut-off events. For 112169/116114 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 219974 event pairs, 5344 based on Foata normal form. 1112/29554 useless extension candidates. Maximal degree in co-relation 117731. Up to 7414 conditions per place. [2023-11-29 01:50:02,108 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 303 selfloop transitions, 22 changer transitions 0/346 dead transitions. [2023-11-29 01:50:02,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 346 transitions, 3009 flow [2023-11-29 01:50:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:50:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:50:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 432 transitions. [2023-11-29 01:50:02,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298507462686567 [2023-11-29 01:50:02,110 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 432 transitions. [2023-11-29 01:50:02,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 432 transitions. [2023-11-29 01:50:02,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:50:02,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 432 transitions. [2023-11-29 01:50:02,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 28.8) internal successors, (432), 15 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:02,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:02,112 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:02,112 INFO L175 Difference]: Start difference. First operand has 146 places, 112 transitions, 835 flow. Second operand 15 states and 432 transitions. [2023-11-29 01:50:02,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 346 transitions, 3009 flow [2023-11-29 01:50:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 346 transitions, 3008 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:50:02,296 INFO L231 Difference]: Finished difference. Result has 161 places, 117 transitions, 931 flow [2023-11-29 01:50:02,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=931, PETRI_PLACES=161, PETRI_TRANSITIONS=117} [2023-11-29 01:50:02,297 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 93 predicate places. [2023-11-29 01:50:02,297 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 117 transitions, 931 flow [2023-11-29 01:50:02,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.434782608695652) internal successors, (401), 23 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:02,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:50:02,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:02,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:50:02,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:02,498 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:50:02,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash 55629020, now seen corresponding path program 1 times [2023-11-29 01:50:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097462400] [2023-11-29 01:50:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:02,807 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 01:50:02,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:02,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097462400] [2023-11-29 01:50:02,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097462400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:02,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903598765] [2023-11-29 01:50:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:02,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:02,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:02,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:50:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:02,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:50:02,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:02,993 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 01:50:03,092 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 01:50:03,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:03,198 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 01:50:03,201 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 01:50:03,207 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 01:50:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903598765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:03,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 01:50:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333115942] [2023-11-29 01:50:03,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:50:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:50:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:50:03,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2023-11-29 01:50:03,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 117 transitions, 931 flow. Second operand has 23 states, 23 states have (on average 17.434782608695652) internal successors, (401), 23 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:03,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:50:03,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2023-11-29 01:50:03,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:50:08,897 INFO L124 PetriNetUnfolderBase]: 17924/28107 cut-off events. [2023-11-29 01:50:08,898 INFO L125 PetriNetUnfolderBase]: For 126545/130290 co-relation queries the response was YES. [2023-11-29 01:50:09,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119126 conditions, 28107 events. 17924/28107 cut-off events. For 126545/130290 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 212171 event pairs, 5344 based on Foata normal form. 1078/28424 useless extension candidates. Maximal degree in co-relation 119077. Up to 7414 conditions per place. [2023-11-29 01:50:09,240 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 271 selfloop transitions, 22 changer transitions 0/314 dead transitions. [2023-11-29 01:50:09,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 314 transitions, 2806 flow [2023-11-29 01:50:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:50:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:50:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 398 transitions. [2023-11-29 01:50:09,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42430703624733473 [2023-11-29 01:50:09,243 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 398 transitions. [2023-11-29 01:50:09,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 398 transitions. [2023-11-29 01:50:09,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:50:09,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 398 transitions. [2023-11-29 01:50:09,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:09,246 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 01:50:09,246 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 01:50:09,246 INFO L175 Difference]: Start difference. First operand has 161 places, 117 transitions, 931 flow. Second operand 14 states and 398 transitions. [2023-11-29 01:50:09,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 314 transitions, 2806 flow [2023-11-29 01:50:09,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 314 transitions, 2759 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-29 01:50:09,579 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 920 flow [2023-11-29 01:50:09,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2023-11-29 01:50:09,580 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 95 predicate places. [2023-11-29 01:50:09,580 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 920 flow [2023-11-29 01:50:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.434782608695652) internal successors, (401), 23 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:50:09,580 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 01:50:09,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:50:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:09,781 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:50:09,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -546237751, now seen corresponding path program 1 times [2023-11-29 01:50:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827251738] [2023-11-29 01:50:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:09,899 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 01:50:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827251738] [2023-11-29 01:50:09,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827251738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407007457] [2023-11-29 01:50:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:09,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:09,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:50:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:10,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:50:10,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:10,251 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 01:50:10,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:10,349 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 01:50:10,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407007457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:10,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 01:50:10,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988067776] [2023-11-29 01:50:10,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:10,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:50:10,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:50:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:50:10,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:50:10,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 920 flow. Second operand has 19 states, 19 states have (on average 16.842105263157894) internal successors, (320), 19 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 01:50:10,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:50:10,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:50:10,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:50:15,164 INFO L124 PetriNetUnfolderBase]: 16234/24153 cut-off events. [2023-11-29 01:50:15,164 INFO L125 PetriNetUnfolderBase]: For 126403/128624 co-relation queries the response was YES. [2023-11-29 01:50:15,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110255 conditions, 24153 events. 16234/24153 cut-off events. For 126403/128624 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 165387 event pairs, 11791 based on Foata normal form. 197/23626 useless extension candidates. Maximal degree in co-relation 110208. Up to 20230 conditions per place. [2023-11-29 01:50:15,421 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 58 selfloop transitions, 12 changer transitions 87/171 dead transitions. [2023-11-29 01:50:15,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 171 transitions, 1608 flow [2023-11-29 01:50:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:50:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:50:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2023-11-29 01:50:15,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776119402985075 [2023-11-29 01:50:15,423 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 253 transitions. [2023-11-29 01:50:15,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 253 transitions. [2023-11-29 01:50:15,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:50:15,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 253 transitions. [2023-11-29 01:50:15,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.3) internal successors, (253), 10 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:15,424 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 01:50:15,424 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 01:50:15,424 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 920 flow. Second operand 10 states and 253 transitions. [2023-11-29 01:50:15,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 171 transitions, 1608 flow [2023-11-29 01:50:15,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 171 transitions, 1543 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-11-29 01:50:15,662 INFO L231 Difference]: Finished difference. Result has 154 places, 84 transitions, 560 flow [2023-11-29 01:50:15,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=560, PETRI_PLACES=154, PETRI_TRANSITIONS=84} [2023-11-29 01:50:15,663 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 86 predicate places. [2023-11-29 01:50:15,663 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 84 transitions, 560 flow [2023-11-29 01:50:15,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.842105263157894) internal successors, (320), 19 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 01:50:15,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:50:15,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:15,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:50:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:15,864 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:50:15,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash -354784847, now seen corresponding path program 2 times [2023-11-29 01:50:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826306826] [2023-11-29 01:50:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826306826] [2023-11-29 01:50:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826306826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589953041] [2023-11-29 01:50:16,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:50:16,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:16,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:16,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:50:16,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:50:16,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:16,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:50:16,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:16,722 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 01:50:16,800 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 01:50:16,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 01:50:17,000 INFO L349 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2023-11-29 01:50:17,000 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 3 case distinctions, treesize of input 69 treesize of output 64 [2023-11-29 01:50:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:18,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:27,434 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 34 treesize of output 32 [2023-11-29 01:50:27,441 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 998 treesize of output 950 [2023-11-29 01:50:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589953041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:27,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:27,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 01:50:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788403702] [2023-11-29 01:50:27,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:50:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:50:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=856, Unknown=2, NotChecked=0, Total=992 [2023-11-29 01:50:31,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:50:35,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:50:39,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:50:43,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:50:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 67 [2023-11-29 01:50:43,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 84 transitions, 560 flow. Second operand has 32 states, 32 states have (on average 15.78125) internal successors, (505), 32 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:43,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:50:43,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 67 [2023-11-29 01:50:43,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:50:56,013 INFO L124 PetriNetUnfolderBase]: 43027/68661 cut-off events. [2023-11-29 01:50:56,013 INFO L125 PetriNetUnfolderBase]: For 231862/231862 co-relation queries the response was YES. [2023-11-29 01:50:56,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274559 conditions, 68661 events. 43027/68661 cut-off events. For 231862/231862 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 542384 event pairs, 17536 based on Foata normal form. 720/66653 useless extension candidates. Maximal degree in co-relation 274523. Up to 15084 conditions per place. [2023-11-29 01:50:56,791 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 306 selfloop transitions, 44 changer transitions 0/362 dead transitions. [2023-11-29 01:50:56,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 362 transitions, 3180 flow [2023-11-29 01:50:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:50:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 01:50:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 573 transitions. [2023-11-29 01:50:56,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718364698247891 [2023-11-29 01:50:56,793 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 573 transitions. [2023-11-29 01:50:56,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 573 transitions. [2023-11-29 01:50:56,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:50:56,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 573 transitions. [2023-11-29 01:50:56,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 24.91304347826087) internal successors, (573), 23 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:56,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 67.0) internal successors, (1608), 24 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:56,797 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 67.0) internal successors, (1608), 24 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:56,798 INFO L175 Difference]: Start difference. First operand has 154 places, 84 transitions, 560 flow. Second operand 23 states and 573 transitions. [2023-11-29 01:50:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 362 transitions, 3180 flow [2023-11-29 01:50:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 362 transitions, 2854 flow, removed 97 selfloop flow, removed 17 redundant places. [2023-11-29 01:50:58,246 INFO L231 Difference]: Finished difference. Result has 141 places, 107 transitions, 767 flow [2023-11-29 01:50:58,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=767, PETRI_PLACES=141, PETRI_TRANSITIONS=107} [2023-11-29 01:50:58,247 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 73 predicate places. [2023-11-29 01:50:58,247 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 107 transitions, 767 flow [2023-11-29 01:50:58,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 15.78125) internal successors, (505), 32 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:58,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:50:58,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:58,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:50:58,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:58,448 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:50:58,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1919911970, now seen corresponding path program 1 times [2023-11-29 01:50:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:58,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046327371] [2023-11-29 01:50:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:58,508 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 01:50:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:58,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046327371] [2023-11-29 01:50:58,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046327371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:58,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93728354] [2023-11-29 01:50:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:58,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:58,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:58,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:58,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:50:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:58,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:50:58,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:58,680 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 01:50:58,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:50:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93728354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:50:58,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:50:58,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 01:50:58,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886774843] [2023-11-29 01:50:58,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:58,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:50:58,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:50:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:50:58,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:50:58,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 107 transitions, 767 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:58,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:50:58,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:50:58,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:51:04,571 INFO L124 PetriNetUnfolderBase]: 26595/41790 cut-off events. [2023-11-29 01:51:04,571 INFO L125 PetriNetUnfolderBase]: For 163952/168990 co-relation queries the response was YES. [2023-11-29 01:51:04,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170381 conditions, 41790 events. 26595/41790 cut-off events. For 163952/168990 co-relation queries the response was YES. Maximal size of possible extension queue 1237. Compared 324220 event pairs, 3066 based on Foata normal form. 2718/44278 useless extension candidates. Maximal degree in co-relation 170352. Up to 13992 conditions per place. [2023-11-29 01:51:05,070 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 268 selfloop transitions, 9 changer transitions 0/294 dead transitions. [2023-11-29 01:51:05,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 294 transitions, 2761 flow [2023-11-29 01:51:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:51:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:51:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2023-11-29 01:51:05,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348258706467661 [2023-11-29 01:51:05,071 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 215 transitions. [2023-11-29 01:51:05,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 215 transitions. [2023-11-29 01:51:05,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:51:05,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 215 transitions. [2023-11-29 01:51:05,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:05,073 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 01:51:05,073 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 01:51:05,073 INFO L175 Difference]: Start difference. First operand has 141 places, 107 transitions, 767 flow. Second operand 6 states and 215 transitions. [2023-11-29 01:51:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 294 transitions, 2761 flow [2023-11-29 01:51:05,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 294 transitions, 2726 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-29 01:51:05,338 INFO L231 Difference]: Finished difference. Result has 135 places, 106 transitions, 754 flow [2023-11-29 01:51:05,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=135, PETRI_TRANSITIONS=106} [2023-11-29 01:51:05,339 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 67 predicate places. [2023-11-29 01:51:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 106 transitions, 754 flow [2023-11-29 01:51:05,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:05,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:51:05,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:05,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:51:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:51:05,539 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:51:05,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -354784846, now seen corresponding path program 2 times [2023-11-29 01:51:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010668153] [2023-11-29 01:51:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:51:06,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010668153] [2023-11-29 01:51:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010668153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141561299] [2023-11-29 01:51:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:51:06,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:06,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:06,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:51:06,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:51:06,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:51:06,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:51:06,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:06,503 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 01:51:06,570 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 01:51:06,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 01:51:06,668 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-29 01:51:06,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 30 [2023-11-29 01:51:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:51:07,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:08,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-29 01:51:08,168 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 926 treesize of output 878 [2023-11-29 01:51:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:51:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141561299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:51:08,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:51:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 01:51:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089610831] [2023-11-29 01:51:08,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:51:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:51:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:51:08,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:51:08,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 106 transitions, 754 flow. Second operand has 32 states, 32 states have (on average 19.5) internal successors, (624), 32 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:08,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:51:08,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:51:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:51:17,731 INFO L124 PetriNetUnfolderBase]: 21445/32897 cut-off events. [2023-11-29 01:51:17,731 INFO L125 PetriNetUnfolderBase]: For 146268/146268 co-relation queries the response was YES. [2023-11-29 01:51:17,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147528 conditions, 32897 events. 21445/32897 cut-off events. For 146268/146268 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 244637 event pairs, 9446 based on Foata normal form. 404/32287 useless extension candidates. Maximal degree in co-relation 147498. Up to 8736 conditions per place. [2023-11-29 01:51:18,156 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 300 selfloop transitions, 44 changer transitions 0/360 dead transitions. [2023-11-29 01:51:18,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 360 transitions, 3227 flow [2023-11-29 01:51:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:51:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 01:51:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 669 transitions. [2023-11-29 01:51:18,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416044776119403 [2023-11-29 01:51:18,158 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 669 transitions. [2023-11-29 01:51:18,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 669 transitions. [2023-11-29 01:51:18,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:51:18,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 669 transitions. [2023-11-29 01:51:18,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 27.875) internal successors, (669), 24 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:18,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 67.0) internal successors, (1675), 25 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:18,161 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 67.0) internal successors, (1675), 25 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:18,161 INFO L175 Difference]: Start difference. First operand has 135 places, 106 transitions, 754 flow. Second operand 24 states and 669 transitions. [2023-11-29 01:51:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 360 transitions, 3227 flow [2023-11-29 01:51:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 360 transitions, 3020 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-29 01:51:18,783 INFO L231 Difference]: Finished difference. Result has 152 places, 106 transitions, 820 flow [2023-11-29 01:51:18,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=820, PETRI_PLACES=152, PETRI_TRANSITIONS=106} [2023-11-29 01:51:18,784 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 84 predicate places. [2023-11-29 01:51:18,784 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 106 transitions, 820 flow [2023-11-29 01:51:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 19.5) internal successors, (624), 32 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:18,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:51:18,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:18,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:51:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:51:18,985 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:51:18,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1882075193, now seen corresponding path program 2 times [2023-11-29 01:51:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:18,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189373728] [2023-11-29 01:51:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:19,357 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 01:51:19,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189373728] [2023-11-29 01:51:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189373728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125953977] [2023-11-29 01:51:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:51:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:19,359 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:19,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:51:19,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:51:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:51:19,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:51:19,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:19,727 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 01:51:19,815 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 01:51:19,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:19,909 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 01:51:19,910 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 20 treesize of output 16 [2023-11-29 01:51:19,916 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 01:51:19,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125953977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:51:19,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:51:19,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-29 01:51:19,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124363353] [2023-11-29 01:51:19,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:19,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:51:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:51:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:51:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:51:20,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 106 transitions, 820 flow. Second operand has 25 states, 25 states have (on average 16.8) internal successors, (420), 25 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:20,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:51:20,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:51:20,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:51:30,022 INFO L124 PetriNetUnfolderBase]: 43809/63641 cut-off events. [2023-11-29 01:51:30,022 INFO L125 PetriNetUnfolderBase]: For 292615/297562 co-relation queries the response was YES. [2023-11-29 01:51:30,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273443 conditions, 63641 events. 43809/63641 cut-off events. For 292615/297562 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 465829 event pairs, 7784 based on Foata normal form. 2296/65441 useless extension candidates. Maximal degree in co-relation 273414. Up to 13412 conditions per place. [2023-11-29 01:51:30,759 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 459 selfloop transitions, 34 changer transitions 0/508 dead transitions. [2023-11-29 01:51:30,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 508 transitions, 4906 flow [2023-11-29 01:51:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 01:51:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 01:51:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 605 transitions. [2023-11-29 01:51:30,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42999289267945984 [2023-11-29 01:51:30,762 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 605 transitions. [2023-11-29 01:51:30,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 605 transitions. [2023-11-29 01:51:30,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:51:30,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 605 transitions. [2023-11-29 01:51:30,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 28.80952380952381) internal successors, (605), 21 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:30,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:30,765 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:30,765 INFO L175 Difference]: Start difference. First operand has 152 places, 106 transitions, 820 flow. Second operand 21 states and 605 transitions. [2023-11-29 01:51:30,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 508 transitions, 4906 flow [2023-11-29 01:51:31,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 508 transitions, 4692 flow, removed 36 selfloop flow, removed 18 redundant places. [2023-11-29 01:51:31,343 INFO L231 Difference]: Finished difference. Result has 158 places, 121 transitions, 960 flow [2023-11-29 01:51:31,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=960, PETRI_PLACES=158, PETRI_TRANSITIONS=121} [2023-11-29 01:51:31,344 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 90 predicate places. [2023-11-29 01:51:31,344 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 121 transitions, 960 flow [2023-11-29 01:51:31,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.8) internal successors, (420), 25 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:31,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:51:31,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:31,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 01:51:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 01:51:31,545 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:51:31,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1882075192, now seen corresponding path program 1 times [2023-11-29 01:51:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:31,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209013610] [2023-11-29 01:51:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:31,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:31,924 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 01:51:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:31,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209013610] [2023-11-29 01:51:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209013610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229448571] [2023-11-29 01:51:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:31,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:31,926 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:31,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:51:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:32,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 01:51:32,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:32,097 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 01:51:32,204 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 01:51:32,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:32,316 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 01:51:32,318 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 01:51:32,323 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 01:51:32,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229448571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:51:32,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:51:32,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-29 01:51:32,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759979320] [2023-11-29 01:51:32,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:51:32,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:51:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:51:32,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:51:32,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 121 transitions, 960 flow. Second operand has 25 states, 25 states have (on average 16.8) internal successors, (420), 25 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:32,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:51:32,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:51:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:51:42,185 INFO L124 PetriNetUnfolderBase]: 41885/61495 cut-off events. [2023-11-29 01:51:42,185 INFO L125 PetriNetUnfolderBase]: For 301775/306236 co-relation queries the response was YES. [2023-11-29 01:51:42,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271183 conditions, 61495 events. 41885/61495 cut-off events. For 301775/306236 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 453620 event pairs, 7616 based on Foata normal form. 2208/63290 useless extension candidates. Maximal degree in co-relation 271150. Up to 12102 conditions per place. [2023-11-29 01:51:42,991 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 431 selfloop transitions, 34 changer transitions 0/480 dead transitions. [2023-11-29 01:51:42,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 480 transitions, 4549 flow [2023-11-29 01:51:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:51:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 01:51:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 571 transitions. [2023-11-29 01:51:42,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261194029850746 [2023-11-29 01:51:42,992 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 571 transitions. [2023-11-29 01:51:42,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 571 transitions. [2023-11-29 01:51:42,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:51:42,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 571 transitions. [2023-11-29 01:51:42,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 28.55) internal successors, (571), 20 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:42,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 67.0) internal successors, (1407), 21 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:42,995 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 67.0) internal successors, (1407), 21 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:42,995 INFO L175 Difference]: Start difference. First operand has 158 places, 121 transitions, 960 flow. Second operand 20 states and 571 transitions. [2023-11-29 01:51:42,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 480 transitions, 4549 flow [2023-11-29 01:51:43,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 480 transitions, 4491 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-29 01:51:43,555 INFO L231 Difference]: Finished difference. Result has 167 places, 121 transitions, 972 flow [2023-11-29 01:51:43,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=972, PETRI_PLACES=167, PETRI_TRANSITIONS=121} [2023-11-29 01:51:43,555 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 99 predicate places. [2023-11-29 01:51:43,555 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 121 transitions, 972 flow [2023-11-29 01:51:43,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.8) internal successors, (420), 25 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:43,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:51:43,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:43,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:51:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 01:51:43,756 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:51:43,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -612270212, now seen corresponding path program 1 times [2023-11-29 01:51:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900585008] [2023-11-29 01:51:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:43,812 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 01:51:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900585008] [2023-11-29 01:51:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900585008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554950567] [2023-11-29 01:51:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:43,814 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:43,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:51:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:43,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:51:43,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:43,973 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 01:51:43,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:44,001 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 01:51:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554950567] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:51:44,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:51:44,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 01:51:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11284326] [2023-11-29 01:51:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:44,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:51:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:51:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:51:44,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:51:44,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 121 transitions, 972 flow. Second operand has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:44,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:51:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:51:44,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:51:56,083 INFO L124 PetriNetUnfolderBase]: 50817/79431 cut-off events. [2023-11-29 01:51:56,084 INFO L125 PetriNetUnfolderBase]: For 458521/463889 co-relation queries the response was YES. [2023-11-29 01:51:56,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355850 conditions, 79431 events. 50817/79431 cut-off events. For 458521/463889 co-relation queries the response was YES. Maximal size of possible extension queue 1669. Compared 645800 event pairs, 13032 based on Foata normal form. 3842/82414 useless extension candidates. Maximal degree in co-relation 355818. Up to 26503 conditions per place. [2023-11-29 01:51:57,250 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 591 selfloop transitions, 13 changer transitions 0/622 dead transitions. [2023-11-29 01:51:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 622 transitions, 6718 flow [2023-11-29 01:51:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:51:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:51:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 373 transitions. [2023-11-29 01:51:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567164179104478 [2023-11-29 01:51:57,251 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 373 transitions. [2023-11-29 01:51:57,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 373 transitions. [2023-11-29 01:51:57,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:51:57,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 373 transitions. [2023-11-29 01:51:57,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.3) internal successors, (373), 10 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:57,253 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 01:51:57,253 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 01:51:57,253 INFO L175 Difference]: Start difference. First operand has 167 places, 121 transitions, 972 flow. Second operand 10 states and 373 transitions. [2023-11-29 01:51:57,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 622 transitions, 6718 flow [2023-11-29 01:51:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 622 transitions, 6489 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-11-29 01:51:57,957 INFO L231 Difference]: Finished difference. Result has 163 places, 128 transitions, 1017 flow [2023-11-29 01:51:57,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1017, PETRI_PLACES=163, PETRI_TRANSITIONS=128} [2023-11-29 01:51:57,958 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 95 predicate places. [2023-11-29 01:51:57,958 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 128 transitions, 1017 flow [2023-11-29 01:51:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:57,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:51:57,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:57,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:51:58,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 01:51:58,159 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:51:58,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 493059678, now seen corresponding path program 1 times [2023-11-29 01:51:58,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:58,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774401743] [2023-11-29 01:51:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:58,221 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 01:51:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774401743] [2023-11-29 01:51:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774401743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916581311] [2023-11-29 01:51:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:58,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:58,223 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:58,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:51:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:58,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:51:58,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:58,410 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 01:51:58,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:51:58,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916581311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:51:58,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:51:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 01:51:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438425636] [2023-11-29 01:51:58,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:51:58,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:51:58,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:51:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:51:58,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:51:58,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 128 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:51:58,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:51:58,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:51:58,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:52:12,058 INFO L124 PetriNetUnfolderBase]: 56185/86141 cut-off events. [2023-11-29 01:52:12,058 INFO L125 PetriNetUnfolderBase]: For 495105/502077 co-relation queries the response was YES. [2023-11-29 01:52:12,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388599 conditions, 86141 events. 56185/86141 cut-off events. For 495105/502077 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 695079 event pairs, 5650 based on Foata normal form. 4389/90191 useless extension candidates. Maximal degree in co-relation 388564. Up to 29074 conditions per place. [2023-11-29 01:52:13,203 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 295 selfloop transitions, 16 changer transitions 0/330 dead transitions. [2023-11-29 01:52:13,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 330 transitions, 3410 flow [2023-11-29 01:52:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:52:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:52:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2023-11-29 01:52:13,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348258706467661 [2023-11-29 01:52:13,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 215 transitions. [2023-11-29 01:52:13,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 215 transitions. [2023-11-29 01:52:13,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:52:13,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 215 transitions. [2023-11-29 01:52:13,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:13,205 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 01:52:13,205 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 01:52:13,205 INFO L175 Difference]: Start difference. First operand has 163 places, 128 transitions, 1017 flow. Second operand 6 states and 215 transitions. [2023-11-29 01:52:13,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 330 transitions, 3410 flow [2023-11-29 01:52:14,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 330 transitions, 3378 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 01:52:14,351 INFO L231 Difference]: Finished difference. Result has 164 places, 127 transitions, 1037 flow [2023-11-29 01:52:14,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1037, PETRI_PLACES=164, PETRI_TRANSITIONS=127} [2023-11-29 01:52:14,352 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-11-29 01:52:14,352 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 127 transitions, 1037 flow [2023-11-29 01:52:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:14,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:52:14,352 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 01:52:14,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:52:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 01:52:14,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:52:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1269883595, now seen corresponding path program 2 times [2023-11-29 01:52:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689298306] [2023-11-29 01:52:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:14,878 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 01:52:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689298306] [2023-11-29 01:52:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689298306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505627598] [2023-11-29 01:52:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:52:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:14,879 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:14,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:52:15,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:52:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:52:15,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:52:15,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:15,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 01:52:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:52:15,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:16,018 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 20 treesize of output 18 [2023-11-29 01:52:16,022 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 26 treesize of output 20 [2023-11-29 01:52:16,172 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 01:52:16,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505627598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:16,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:52:16,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 01:52:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522456375] [2023-11-29 01:52:16,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:16,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:52:16,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:52:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:52:16,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:52:16,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 127 transitions, 1037 flow. Second operand has 32 states, 32 states have (on average 16.6875) internal successors, (534), 32 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:16,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:52:16,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:52:16,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:52:32,714 INFO L124 PetriNetUnfolderBase]: 57299/80719 cut-off events. [2023-11-29 01:52:32,714 INFO L125 PetriNetUnfolderBase]: For 534610/535664 co-relation queries the response was YES. [2023-11-29 01:52:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403936 conditions, 80719 events. 57299/80719 cut-off events. For 534610/535664 co-relation queries the response was YES. Maximal size of possible extension queue 1796. Compared 573980 event pairs, 17662 based on Foata normal form. 764/78962 useless extension candidates. Maximal degree in co-relation 403900. Up to 22867 conditions per place. [2023-11-29 01:52:33,863 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 504 selfloop transitions, 45 changer transitions 0/565 dead transitions. [2023-11-29 01:52:33,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 565 transitions, 5869 flow [2023-11-29 01:52:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:52:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 01:52:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 631 transitions. [2023-11-29 01:52:33,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280868385345997 [2023-11-29 01:52:33,865 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 631 transitions. [2023-11-29 01:52:33,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 631 transitions. [2023-11-29 01:52:33,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:52:33,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 631 transitions. [2023-11-29 01:52:33,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 28.681818181818183) internal successors, (631), 22 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:33,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 67.0) internal successors, (1541), 23 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:33,868 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 67.0) internal successors, (1541), 23 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:33,868 INFO L175 Difference]: Start difference. First operand has 164 places, 127 transitions, 1037 flow. Second operand 22 states and 631 transitions. [2023-11-29 01:52:33,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 565 transitions, 5869 flow [2023-11-29 01:52:35,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 565 transitions, 5566 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-29 01:52:35,793 INFO L231 Difference]: Finished difference. Result has 174 places, 132 transitions, 1090 flow [2023-11-29 01:52:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1090, PETRI_PLACES=174, PETRI_TRANSITIONS=132} [2023-11-29 01:52:35,793 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 106 predicate places. [2023-11-29 01:52:35,793 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 132 transitions, 1090 flow [2023-11-29 01:52:35,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 16.6875) internal successors, (534), 32 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:35,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:52:35,793 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 01:52:35,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 01:52:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 01:52:35,994 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:52:35,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1269883596, now seen corresponding path program 1 times [2023-11-29 01:52:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787073189] [2023-11-29 01:52:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:36,375 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 01:52:36,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787073189] [2023-11-29 01:52:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787073189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954162866] [2023-11-29 01:52:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:36,377 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:36,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:52:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:36,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 01:52:36,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:36,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 01:52:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:52:36,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:37,337 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 01:52:37,339 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 16 [2023-11-29 01:52:37,493 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 01:52:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954162866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:37,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:52:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 01:52:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756319636] [2023-11-29 01:52:37,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:52:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:52:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:52:37,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:52:37,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 132 transitions, 1090 flow. Second operand has 32 states, 32 states have (on average 16.6875) internal successors, (534), 32 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:37,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:52:37,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:52:37,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:52:54,277 INFO L124 PetriNetUnfolderBase]: 55103/77957 cut-off events. [2023-11-29 01:52:54,277 INFO L125 PetriNetUnfolderBase]: For 446360/447374 co-relation queries the response was YES. [2023-11-29 01:52:55,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376692 conditions, 77957 events. 55103/77957 cut-off events. For 446360/447374 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 555020 event pairs, 17662 based on Foata normal form. 764/76622 useless extension candidates. Maximal degree in co-relation 376658. Up to 22867 conditions per place. [2023-11-29 01:52:55,453 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 502 selfloop transitions, 45 changer transitions 0/563 dead transitions. [2023-11-29 01:52:55,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 563 transitions, 5649 flow [2023-11-29 01:52:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:52:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 01:52:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 629 transitions. [2023-11-29 01:52:55,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42672998643147897 [2023-11-29 01:52:55,455 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 629 transitions. [2023-11-29 01:52:55,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 629 transitions. [2023-11-29 01:52:55,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:52:55,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 629 transitions. [2023-11-29 01:52:55,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 28.59090909090909) internal successors, (629), 22 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:55,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 67.0) internal successors, (1541), 23 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:55,460 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 67.0) internal successors, (1541), 23 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:55,460 INFO L175 Difference]: Start difference. First operand has 174 places, 132 transitions, 1090 flow. Second operand 22 states and 629 transitions. [2023-11-29 01:52:55,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 563 transitions, 5649 flow [2023-11-29 01:52:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 563 transitions, 5541 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-11-29 01:52:58,978 INFO L231 Difference]: Finished difference. Result has 182 places, 130 transitions, 1063 flow [2023-11-29 01:52:58,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1063, PETRI_PLACES=182, PETRI_TRANSITIONS=130} [2023-11-29 01:52:58,978 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2023-11-29 01:52:58,978 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 130 transitions, 1063 flow [2023-11-29 01:52:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 16.6875) internal successors, (534), 32 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:58,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:52:58,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:58,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:52:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 01:52:59,179 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:52:59,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash 520139493, now seen corresponding path program 2 times [2023-11-29 01:52:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434027710] [2023-11-29 01:52:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:52:59,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434027710] [2023-11-29 01:52:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434027710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641362498] [2023-11-29 01:52:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:52:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:59,314 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:59,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:52:59,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:52:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:52:59,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:52:59,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:52:59,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:52:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641362498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:52:59,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:52:59,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2023-11-29 01:52:59,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754693360] [2023-11-29 01:52:59,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:52:59,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:52:59,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:59,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:52:59,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:52:59,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 67 [2023-11-29 01:52:59,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 130 transitions, 1063 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 01:52:59,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:52:59,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 67 [2023-11-29 01:52:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:53:10,508 INFO L124 PetriNetUnfolderBase]: 49613/72339 cut-off events. [2023-11-29 01:53:10,508 INFO L125 PetriNetUnfolderBase]: For 407055/407967 co-relation queries the response was YES. [2023-11-29 01:53:11,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340013 conditions, 72339 events. 49613/72339 cut-off events. For 407055/407967 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 533962 event pairs, 16392 based on Foata normal form. 1910/71936 useless extension candidates. Maximal degree in co-relation 339980. Up to 30956 conditions per place. [2023-11-29 01:53:11,444 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 184 selfloop transitions, 17 changer transitions 0/217 dead transitions. [2023-11-29 01:53:11,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 217 transitions, 2195 flow [2023-11-29 01:53:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:53:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:53:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2023-11-29 01:53:11,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597014925373134 [2023-11-29 01:53:11,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 154 transitions. [2023-11-29 01:53:11,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 154 transitions. [2023-11-29 01:53:11,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:53:11,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 154 transitions. [2023-11-29 01:53:11,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:11,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:11,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:11,446 INFO L175 Difference]: Start difference. First operand has 182 places, 130 transitions, 1063 flow. Second operand 5 states and 154 transitions. [2023-11-29 01:53:11,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 217 transitions, 2195 flow [2023-11-29 01:53:12,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 217 transitions, 2114 flow, removed 1 selfloop flow, removed 21 redundant places. [2023-11-29 01:53:12,421 INFO L231 Difference]: Finished difference. Result has 164 places, 129 transitions, 1012 flow [2023-11-29 01:53:12,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1012, PETRI_PLACES=164, PETRI_TRANSITIONS=129} [2023-11-29 01:53:12,422 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-11-29 01:53:12,422 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 129 transitions, 1012 flow [2023-11-29 01:53:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 01:53:12,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:53:12,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 01:53:12,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:53:12,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 01:53:12,623 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:53:12,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash 18872993, now seen corresponding path program 2 times [2023-11-29 01:53:12,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:12,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456090206] [2023-11-29 01:53:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:12,763 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 01:53:12,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456090206] [2023-11-29 01:53:12,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456090206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414981783] [2023-11-29 01:53:12,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:53:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:12,765 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:12,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:53:12,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:53:12,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:53:12,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:53:12,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:13,060 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 01:53:13,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:13,206 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 01:53:13,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414981783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:13,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:53:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-29 01:53:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186946995] [2023-11-29 01:53:13,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:13,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:53:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:53:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:53:13,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:53:13,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 129 transitions, 1012 flow. Second operand has 30 states, 30 states have (on average 16.5) internal successors, (495), 30 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 01:53:13,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:53:13,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:53:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:53:24,595 INFO L124 PetriNetUnfolderBase]: 45885/67794 cut-off events. [2023-11-29 01:53:24,595 INFO L125 PetriNetUnfolderBase]: For 388472/392482 co-relation queries the response was YES. [2023-11-29 01:53:25,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308463 conditions, 67794 events. 45885/67794 cut-off events. For 388472/392482 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 486869 event pairs, 31891 based on Foata normal form. 628/67627 useless extension candidates. Maximal degree in co-relation 308430. Up to 55851 conditions per place. [2023-11-29 01:53:25,326 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 220 selfloop transitions, 24 changer transitions 20/283 dead transitions. [2023-11-29 01:53:25,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 283 transitions, 2627 flow [2023-11-29 01:53:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:53:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:53:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 360 transitions. [2023-11-29 01:53:25,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837953091684435 [2023-11-29 01:53:25,328 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 360 transitions. [2023-11-29 01:53:25,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 360 transitions. [2023-11-29 01:53:25,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:53:25,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 360 transitions. [2023-11-29 01:53:25,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.714285714285715) internal successors, (360), 14 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 01:53:25,330 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 01:53:25,330 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 01:53:25,330 INFO L175 Difference]: Start difference. First operand has 164 places, 129 transitions, 1012 flow. Second operand 14 states and 360 transitions. [2023-11-29 01:53:25,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 283 transitions, 2627 flow [2023-11-29 01:53:26,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 283 transitions, 2573 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 01:53:26,408 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1117 flow [2023-11-29 01:53:26,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1117, PETRI_PLACES=179, PETRI_TRANSITIONS=135} [2023-11-29 01:53:26,408 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 111 predicate places. [2023-11-29 01:53:26,408 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1117 flow [2023-11-29 01:53:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 16.5) internal successors, (495), 30 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 01:53:26,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:53:26,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:53:26,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 01:53:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 01:53:26,609 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:53:26,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1895018289, now seen corresponding path program 1 times [2023-11-29 01:53:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541257199] [2023-11-29 01:53:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:26,653 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 01:53:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:26,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541257199] [2023-11-29 01:53:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541257199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806111419] [2023-11-29 01:53:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:26,655 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:26,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:53:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:26,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:53:26,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:26,813 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 01:53:26,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:26,838 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 01:53:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806111419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:26,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:53:26,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 01:53:26,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171125845] [2023-11-29 01:53:26,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:26,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:53:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:53:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:53:26,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 67 [2023-11-29 01:53:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 135 transitions, 1117 flow. Second operand has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:26,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:53:26,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 67 [2023-11-29 01:53:26,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:53:44,316 INFO L124 PetriNetUnfolderBase]: 67063/103153 cut-off events. [2023-11-29 01:53:44,316 INFO L125 PetriNetUnfolderBase]: For 643995/654477 co-relation queries the response was YES. [2023-11-29 01:53:45,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459667 conditions, 103153 events. 67063/103153 cut-off events. For 643995/654477 co-relation queries the response was YES. Maximal size of possible extension queue 1959. Compared 835328 event pairs, 16245 based on Foata normal form. 4144/107125 useless extension candidates. Maximal degree in co-relation 459628. Up to 34026 conditions per place. [2023-11-29 01:53:45,823 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 549 selfloop transitions, 19 changer transitions 0/592 dead transitions. [2023-11-29 01:53:45,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 592 transitions, 6386 flow [2023-11-29 01:53:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:53:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:53:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 373 transitions. [2023-11-29 01:53:45,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567164179104478 [2023-11-29 01:53:45,824 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 373 transitions. [2023-11-29 01:53:45,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 373 transitions. [2023-11-29 01:53:45,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:53:45,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 373 transitions. [2023-11-29 01:53:45,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.3) internal successors, (373), 10 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:45,826 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 01:53:45,827 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 01:53:45,827 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1117 flow. Second operand 10 states and 373 transitions. [2023-11-29 01:53:45,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 592 transitions, 6386 flow [2023-11-29 01:53:48,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 592 transitions, 6319 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-29 01:53:48,083 INFO L231 Difference]: Finished difference. Result has 184 places, 144 transitions, 1215 flow [2023-11-29 01:53:48,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1215, PETRI_PLACES=184, PETRI_TRANSITIONS=144} [2023-11-29 01:53:48,084 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 116 predicate places. [2023-11-29 01:53:48,084 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 144 transitions, 1215 flow [2023-11-29 01:53:48,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:48,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:53:48,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:53:48,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:53:48,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 01:53:48,286 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:53:48,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash -46414573, now seen corresponding path program 2 times [2023-11-29 01:53:48,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:48,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423022100] [2023-11-29 01:53:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:48,474 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 01:53:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423022100] [2023-11-29 01:53:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423022100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936198916] [2023-11-29 01:53:48,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:53:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:48,476 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:53:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:53:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:53:48,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:53:48,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:48,899 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 01:53:48,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:49,076 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 01:53:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936198916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:49,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:53:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2023-11-29 01:53:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446590439] [2023-11-29 01:53:49,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:49,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:53:49,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:53:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:53:49,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 67 [2023-11-29 01:53:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 144 transitions, 1215 flow. Second operand has 31 states, 31 states have (on average 16.612903225806452) internal successors, (515), 31 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 01:53:49,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:53:49,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 67 [2023-11-29 01:53:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:09,981 INFO L124 PetriNetUnfolderBase]: 74768/110366 cut-off events. [2023-11-29 01:54:09,981 INFO L125 PetriNetUnfolderBase]: For 706970/717330 co-relation queries the response was YES. [2023-11-29 01:54:10,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513363 conditions, 110366 events. 74768/110366 cut-off events. For 706970/717330 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 842090 event pairs, 55443 based on Foata normal form. 1272/110949 useless extension candidates. Maximal degree in co-relation 513321. Up to 97016 conditions per place. [2023-11-29 01:54:11,477 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 79 selfloop transitions, 15 changer transitions 145/256 dead transitions. [2023-11-29 01:54:11,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 256 transitions, 2481 flow [2023-11-29 01:54:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:54:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 01:54:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 346 transitions. [2023-11-29 01:54:11,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36886993603411516 [2023-11-29 01:54:11,478 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 346 transitions. [2023-11-29 01:54:11,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 346 transitions. [2023-11-29 01:54:11,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:11,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 346 transitions. [2023-11-29 01:54:11,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.714285714285715) internal successors, (346), 14 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:11,480 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 01:54:11,480 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 01:54:11,480 INFO L175 Difference]: Start difference. First operand has 184 places, 144 transitions, 1215 flow. Second operand 14 states and 346 transitions. [2023-11-29 01:54:11,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 256 transitions, 2481 flow [2023-11-29 01:54:13,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 256 transitions, 2462 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 01:54:13,916 INFO L231 Difference]: Finished difference. Result has 193 places, 111 transitions, 927 flow [2023-11-29 01:54:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=927, PETRI_PLACES=193, PETRI_TRANSITIONS=111} [2023-11-29 01:54:13,917 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 125 predicate places. [2023-11-29 01:54:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 111 transitions, 927 flow [2023-11-29 01:54:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.612903225806452) internal successors, (515), 31 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 01:54:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:13,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 01:54:13,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:54:14,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:14,118 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 01:54:14,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1458308701, now seen corresponding path program 3 times [2023-11-29 01:54:14,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:14,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236221365] [2023-11-29 01:54:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:14,440 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 01:54:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236221365] [2023-11-29 01:54:14,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236221365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:54:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907608501] [2023-11-29 01:54:14,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:54:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:14,442 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:14,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1efabf-b2fa-4507-aab0-b260cf45d28b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:54:14,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:54:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:54:14,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:54:14,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:14,629 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 01:54:14,723 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 01:54:14,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:54:14,855 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 01:54:14,857 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 20 treesize of output 16 [2023-11-29 01:54:14,933 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 01:54:14,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907608501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:54:14,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:54:14,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-11-29 01:54:14,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295211036] [2023-11-29 01:54:14,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:54:14,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 01:54:14,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:14,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 01:54:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:54:15,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 67 [2023-11-29 01:54:15,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 111 transitions, 927 flow. Second operand has 29 states, 29 states have (on average 17.344827586206897) internal successors, (503), 29 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:15,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:15,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 67 [2023-11-29 01:54:15,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand