./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/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_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/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_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:59:05,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:59:05,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 01:59:05,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:59:05,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:59:05,194 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:59:05,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:59:05,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:59:05,196 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:59:05,197 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:59:05,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:59:05,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:59:05,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:59:05,199 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:59:05,200 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:59:05,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:59:05,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:59:05,202 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:59:05,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:59:05,203 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:59:05,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:59:05,204 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:59:05,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:59:05,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:59:05,205 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 01:59:05,206 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:59:05,206 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:59:05,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:59:05,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:59:05,207 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:59:05,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:59:05,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:59:05,209 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:59:05,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:59:05,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:59:05,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:59:05,210 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:59:05,210 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:59:05,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:59:05,210 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:59:05,210 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:59:05,211 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:59:05,211 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:59:05,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:59:05,211 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_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2023-11-29 01:59:05,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:59:05,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:59:05,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:59:05,429 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:59:05,430 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:59:05,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-29 01:59:08,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:59:08,356 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:59:08,356 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-29 01:59:08,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/data/0fe7c6dee/8b382e515646424fa1a5b02217f88243/FLAGb71bbf409 [2023-11-29 01:59:08,375 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/data/0fe7c6dee/8b382e515646424fa1a5b02217f88243 [2023-11-29 01:59:08,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:59:08,379 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:59:08,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:59:08,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:59:08,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:59:08,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40acefbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08, skipping insertion in model container [2023-11-29 01:59:08,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:59:08,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:59:08,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:59:08,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:59:08,618 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:59:08,618 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:59:08,623 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:59:08,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08 WrapperNode [2023-11-29 01:59:08,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:59:08,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:59:08,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:59:08,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:59:08,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,663 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 279 [2023-11-29 01:59:08,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:59:08,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:59:08,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:59:08,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:59:08,672 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,677 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,692 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 2, 1]. [2023-11-29 01:59:08,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,711 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:59:08,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:59:08,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:59:08,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:59:08,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (1/1) ... [2023-11-29 01:59:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:59:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:08,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:59:08,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:59:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 01:59:08,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 01:59:08,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 01:59:08,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 01:59:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 01:59:08,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 01:59:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:59:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:59:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:59:08,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:59:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:59:08,787 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 01:59:08,907 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:59:08,910 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:59:09,283 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:59:09,685 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:59:09,685 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 01:59:09,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:59:09 BoogieIcfgContainer [2023-11-29 01:59:09,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:59:09,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:59:09,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:59:09,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:59:09,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:59:08" (1/3) ... [2023-11-29 01:59:09,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c89098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:59:09, skipping insertion in model container [2023-11-29 01:59:09,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:59:08" (2/3) ... [2023-11-29 01:59:09,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c89098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:59:09, skipping insertion in model container [2023-11-29 01:59:09,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:59:09" (3/3) ... [2023-11-29 01:59:09,694 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-11-29 01:59:09,703 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 01:59:09,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:59:09,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-29 01:59:09,714 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:59:09,787 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 01:59:09,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 72 transitions, 165 flow [2023-11-29 01:59:09,872 INFO L124 PetriNetUnfolderBase]: 7/69 cut-off events. [2023-11-29 01:59:09,872 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 01:59:09,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 7/69 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 213 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-29 01:59:09,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 72 transitions, 165 flow [2023-11-29 01:59:09,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 149 flow [2023-11-29 01:59:09,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:59:09,900 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;@705f7079, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:59:09,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-29 01:59:09,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:59:09,905 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 01:59:09,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:59:09,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:09,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:59:09,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:09,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash 805212, now seen corresponding path program 1 times [2023-11-29 01:59:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:09,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942352614] [2023-11-29 01:59:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:10,192 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 01:59:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942352614] [2023-11-29 01:59:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942352614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:10,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:10,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975261445] [2023-11-29 01:59:10,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:10,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:10,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:10,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:10,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:10,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:10,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:10,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:10,834 INFO L124 PetriNetUnfolderBase]: 2275/3939 cut-off events. [2023-11-29 01:59:10,834 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-29 01:59:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7308 conditions, 3939 events. 2275/3939 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25975 event pairs, 2013 based on Foata normal form. 272/3154 useless extension candidates. Maximal degree in co-relation 6643. Up to 3160 conditions per place. [2023-11-29 01:59:10,881 INFO L140 encePairwiseOnDemand]: 54/72 looper letters, 40 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2023-11-29 01:59:10,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 241 flow [2023-11-29 01:59:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-29 01:59:10,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-11-29 01:59:10,894 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-29 01:59:10,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-29 01:59:10,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:10,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-29 01:59:10,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:10,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:10,905 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:10,907 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 149 flow. Second operand 4 states and 146 transitions. [2023-11-29 01:59:10,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 241 flow [2023-11-29 01:59:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 01:59:10,923 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 186 flow [2023-11-29 01:59:10,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-11-29 01:59:10,928 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2023-11-29 01:59:10,928 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 186 flow [2023-11-29 01:59:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:10,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:10,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 01:59:10,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:59:10,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:10,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1780914418, now seen corresponding path program 1 times [2023-11-29 01:59:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:10,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70505212] [2023-11-29 01:59:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:11,064 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 01:59:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:11,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70505212] [2023-11-29 01:59:11,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70505212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:11,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54451060] [2023-11-29 01:59:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:11,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:11,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:11,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:59:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:11,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:59:11,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:11,228 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 01:59:11,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54451060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:11,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:11,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 01:59:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249152456] [2023-11-29 01:59:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:59:11,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:59:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:59:11,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:11,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:11,867 INFO L124 PetriNetUnfolderBase]: 2275/3937 cut-off events. [2023-11-29 01:59:11,868 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-29 01:59:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7263 conditions, 3937 events. 2275/3937 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25913 event pairs, 2013 based on Foata normal form. 2/2885 useless extension candidates. Maximal degree in co-relation 7213. Up to 3150 conditions per place. [2023-11-29 01:59:11,909 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 33 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-11-29 01:59:11,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 268 flow [2023-11-29 01:59:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:59:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:59:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2023-11-29 01:59:11,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41435185185185186 [2023-11-29 01:59:11,912 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2023-11-29 01:59:11,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2023-11-29 01:59:11,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:11,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2023-11-29 01:59:11,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,917 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 186 flow. Second operand 6 states and 179 transitions. [2023-11-29 01:59:11,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 268 flow [2023-11-29 01:59:11,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:59:11,919 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 202 flow [2023-11-29 01:59:11,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-29 01:59:11,921 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-11-29 01:59:11,921 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 202 flow [2023-11-29 01:59:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:11,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:11,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:11,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:12,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:12,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash 692046454, now seen corresponding path program 1 times [2023-11-29 01:59:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411487819] [2023-11-29 01:59:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:12,268 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 01:59:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411487819] [2023-11-29 01:59:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411487819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:12,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171356196] [2023-11-29 01:59:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:12,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:12,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:12,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:12,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:12,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:12,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:12,817 INFO L124 PetriNetUnfolderBase]: 2409/4206 cut-off events. [2023-11-29 01:59:12,817 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-29 01:59:12,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7798 conditions, 4206 events. 2409/4206 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27619 event pairs, 2140 based on Foata normal form. 98/3267 useless extension candidates. Maximal degree in co-relation 7217. Up to 3158 conditions per place. [2023-11-29 01:59:12,859 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 59 selfloop transitions, 3 changer transitions 1/84 dead transitions. [2023-11-29 01:59:12,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 402 flow [2023-11-29 01:59:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2023-11-29 01:59:12,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798611111111112 [2023-11-29 01:59:12,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 167 transitions. [2023-11-29 01:59:12,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 167 transitions. [2023-11-29 01:59:12,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:12,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 167 transitions. [2023-11-29 01:59:12,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:12,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:12,864 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:12,864 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 202 flow. Second operand 4 states and 167 transitions. [2023-11-29 01:59:12,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 402 flow [2023-11-29 01:59:12,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 360 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-29 01:59:12,868 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 193 flow [2023-11-29 01:59:12,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-11-29 01:59:12,869 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2023-11-29 01:59:12,870 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 193 flow [2023-11-29 01:59:12,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:12,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:12,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 01:59:12,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:59:12,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:12,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash 626228714, now seen corresponding path program 1 times [2023-11-29 01:59:12,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:12,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087375110] [2023-11-29 01:59:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:12,958 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 01:59:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:12,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087375110] [2023-11-29 01:59:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087375110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:12,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995836954] [2023-11-29 01:59:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:12,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:12,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:12,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:59:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:13,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:59:13,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:13,090 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 01:59:13,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:13,135 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 01:59:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995836954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:13,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:13,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 01:59:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962103189] [2023-11-29 01:59:13,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:59:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:59:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:13,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:13,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 193 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:13,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:13,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:13,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:13,759 INFO L124 PetriNetUnfolderBase]: 2406/4166 cut-off events. [2023-11-29 01:59:13,759 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-11-29 01:59:13,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8503 conditions, 4166 events. 2406/4166 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 27193 event pairs, 2140 based on Foata normal form. 9/3132 useless extension candidates. Maximal degree in co-relation 7934. Up to 3387 conditions per place. [2023-11-29 01:59:13,793 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 38 selfloop transitions, 25 changer transitions 0/82 dead transitions. [2023-11-29 01:59:13,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 403 flow [2023-11-29 01:59:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:59:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:59:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2023-11-29 01:59:13,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013888888888889 [2023-11-29 01:59:13,795 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 289 transitions. [2023-11-29 01:59:13,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 289 transitions. [2023-11-29 01:59:13,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:13,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 289 transitions. [2023-11-29 01:59:13,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.9) internal successors, (289), 10 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:13,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:13,800 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:13,800 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 193 flow. Second operand 10 states and 289 transitions. [2023-11-29 01:59:13,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 403 flow [2023-11-29 01:59:13,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:13,804 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 357 flow [2023-11-29 01:59:13,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=357, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2023-11-29 01:59:13,805 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 9 predicate places. [2023-11-29 01:59:13,805 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 357 flow [2023-11-29 01:59:13,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:13,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:13,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:13,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:59:14,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:14,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:14,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1291665624, now seen corresponding path program 1 times [2023-11-29 01:59:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:14,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475976039] [2023-11-29 01:59:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:14,136 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 01:59:14,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475976039] [2023-11-29 01:59:14,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475976039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660760904] [2023-11-29 01:59:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:14,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:14,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:59:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:14,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:59:14,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:14,260 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 01:59:14,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:14,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660760904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:14,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:14,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-29 01:59:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279010094] [2023-11-29 01:59:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:14,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:59:14,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:14,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 357 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:14,522 INFO L124 PetriNetUnfolderBase]: 1668/2950 cut-off events. [2023-11-29 01:59:14,522 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2023-11-29 01:59:14,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5868 conditions, 2950 events. 1668/2950 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17978 event pairs, 1452 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 5771. Up to 2384 conditions per place. [2023-11-29 01:59:14,538 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 57 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-29 01:59:14,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 461 flow [2023-11-29 01:59:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-29 01:59:14,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2023-11-29 01:59:14,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-29 01:59:14,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-29 01:59:14,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:14,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-29 01:59:14,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,541 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 357 flow. Second operand 3 states and 115 transitions. [2023-11-29 01:59:14,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 461 flow [2023-11-29 01:59:14,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 01:59:14,545 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 315 flow [2023-11-29 01:59:14,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-11-29 01:59:14,546 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2023-11-29 01:59:14,547 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 315 flow [2023-11-29 01:59:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:14,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:14,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:59:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:14,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:14,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1806684618, now seen corresponding path program 1 times [2023-11-29 01:59:14,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:14,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114664411] [2023-11-29 01:59:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:14,810 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 01:59:14,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114664411] [2023-11-29 01:59:14,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114664411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:14,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:14,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:59:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612926474] [2023-11-29 01:59:14,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:14,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:14,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:14,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:14,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:14,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:15,150 INFO L124 PetriNetUnfolderBase]: 1522/2780 cut-off events. [2023-11-29 01:59:15,150 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2023-11-29 01:59:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5554 conditions, 2780 events. 1522/2780 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16493 event pairs, 538 based on Foata normal form. 47/2402 useless extension candidates. Maximal degree in co-relation 5540. Up to 1613 conditions per place. [2023-11-29 01:59:15,171 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-29 01:59:15,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 500 flow [2023-11-29 01:59:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-29 01:59:15,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-11-29 01:59:15,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-29 01:59:15,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-29 01:59:15,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:15,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-29 01:59:15,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,175 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 315 flow. Second operand 3 states and 129 transitions. [2023-11-29 01:59:15,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 500 flow [2023-11-29 01:59:15,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 94 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:15,179 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 328 flow [2023-11-29 01:59:15,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2023-11-29 01:59:15,180 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 7 predicate places. [2023-11-29 01:59:15,181 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 328 flow [2023-11-29 01:59:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:59:15,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:15,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash -45088725, now seen corresponding path program 1 times [2023-11-29 01:59:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420311057] [2023-11-29 01:59:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:15,241 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 01:59:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420311057] [2023-11-29 01:59:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420311057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:59:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365010077] [2023-11-29 01:59:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:15,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-29 01:59:15,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:15,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-29 01:59:15,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:15,914 INFO L124 PetriNetUnfolderBase]: 2906/5094 cut-off events. [2023-11-29 01:59:15,914 INFO L125 PetriNetUnfolderBase]: For 932/932 co-relation queries the response was YES. [2023-11-29 01:59:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 5094 events. 2906/5094 cut-off events. For 932/932 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 32995 event pairs, 1658 based on Foata normal form. 96/4650 useless extension candidates. Maximal degree in co-relation 10712. Up to 3185 conditions per place. [2023-11-29 01:59:15,950 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 96 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-11-29 01:59:15,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 634 flow [2023-11-29 01:59:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2023-11-29 01:59:15,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798611111111112 [2023-11-29 01:59:15,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 167 transitions. [2023-11-29 01:59:15,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 167 transitions. [2023-11-29 01:59:15,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:15,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 167 transitions. [2023-11-29 01:59:15,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:15,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:15,954 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 328 flow. Second operand 4 states and 167 transitions. [2023-11-29 01:59:15,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 634 flow [2023-11-29 01:59:15,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:15,959 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 355 flow [2023-11-29 01:59:15,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-29 01:59:15,960 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2023-11-29 01:59:15,960 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 355 flow [2023-11-29 01:59:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:15,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:15,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:59:15,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1696665523, now seen corresponding path program 1 times [2023-11-29 01:59:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:15,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952410367] [2023-11-29 01:59:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:16,017 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 01:59:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952410367] [2023-11-29 01:59:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952410367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:16,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:16,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:59:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118635123] [2023-11-29 01:59:16,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:16,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:16,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:16,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:16,414 INFO L124 PetriNetUnfolderBase]: 1610/3028 cut-off events. [2023-11-29 01:59:16,414 INFO L125 PetriNetUnfolderBase]: For 919/1135 co-relation queries the response was YES. [2023-11-29 01:59:16,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6783 conditions, 3028 events. 1610/3028 cut-off events. For 919/1135 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18700 event pairs, 722 based on Foata normal form. 91/2815 useless extension candidates. Maximal degree in co-relation 6765. Up to 2097 conditions per place. [2023-11-29 01:59:16,437 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 67 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-11-29 01:59:16,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 520 flow [2023-11-29 01:59:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-29 01:59:16,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2023-11-29 01:59:16,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-29 01:59:16,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-29 01:59:16,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:16,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-29 01:59:16,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,440 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 355 flow. Second operand 3 states and 123 transitions. [2023-11-29 01:59:16,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 520 flow [2023-11-29 01:59:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 92 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:16,444 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 375 flow [2023-11-29 01:59:16,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-11-29 01:59:16,445 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 13 predicate places. [2023-11-29 01:59:16,445 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 375 flow [2023-11-29 01:59:16,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:16,446 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 01:59:16,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:59:16,446 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:16,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash 237047772, now seen corresponding path program 2 times [2023-11-29 01:59:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:16,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307024001] [2023-11-29 01:59:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:16,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:16,595 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 01:59:16,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:16,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307024001] [2023-11-29 01:59:16,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307024001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:16,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883897338] [2023-11-29 01:59:16,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:59:16,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:16,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:16,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:16,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:59:16,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:59:16,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:16,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:59:16,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:16,752 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 01:59:16,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:16,788 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 01:59:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883897338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:16,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 01:59:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396434508] [2023-11-29 01:59:16,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:16,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:59:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:59:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:59:16,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:16,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 375 flow. Second operand has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:16,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:16,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:16,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:17,405 INFO L124 PetriNetUnfolderBase]: 1613/2963 cut-off events. [2023-11-29 01:59:17,405 INFO L125 PetriNetUnfolderBase]: For 1585/1862 co-relation queries the response was YES. [2023-11-29 01:59:17,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 2963 events. 1613/2963 cut-off events. For 1585/1862 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18003 event pairs, 1238 based on Foata normal form. 97/2757 useless extension candidates. Maximal degree in co-relation 6920. Up to 2295 conditions per place. [2023-11-29 01:59:17,421 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 36 selfloop transitions, 34 changer transitions 0/90 dead transitions. [2023-11-29 01:59:17,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 90 transitions, 543 flow [2023-11-29 01:59:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:59:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 01:59:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 596 transitions. [2023-11-29 01:59:17,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449074074074074 [2023-11-29 01:59:17,425 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 596 transitions. [2023-11-29 01:59:17,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 596 transitions. [2023-11-29 01:59:17,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:17,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 596 transitions. [2023-11-29 01:59:17,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 24.833333333333332) internal successors, (596), 24 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,433 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,433 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 375 flow. Second operand 24 states and 596 transitions. [2023-11-29 01:59:17,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 90 transitions, 543 flow [2023-11-29 01:59:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 90 transitions, 534 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:17,437 INFO L231 Difference]: Finished difference. Result has 106 places, 90 transitions, 475 flow [2023-11-29 01:59:17,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=81, 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=24, PETRI_FLOW=475, PETRI_PLACES=106, PETRI_TRANSITIONS=90} [2023-11-29 01:59:17,438 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 36 predicate places. [2023-11-29 01:59:17,438 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 90 transitions, 475 flow [2023-11-29 01:59:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:17,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:59:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:17,641 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:17,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1216970966, now seen corresponding path program 1 times [2023-11-29 01:59:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051150743] [2023-11-29 01:59:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:17,739 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 01:59:17,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051150743] [2023-11-29 01:59:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051150743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:17,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:59:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097548527] [2023-11-29 01:59:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:59:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:59:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:59:17,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:17,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 90 transitions, 475 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:17,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:17,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:17,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:18,194 INFO L124 PetriNetUnfolderBase]: 1939/3555 cut-off events. [2023-11-29 01:59:18,194 INFO L125 PetriNetUnfolderBase]: For 1283/1609 co-relation queries the response was YES. [2023-11-29 01:59:18,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8114 conditions, 3555 events. 1939/3555 cut-off events. For 1283/1609 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 21533 event pairs, 1526 based on Foata normal form. 190/3440 useless extension candidates. Maximal degree in co-relation 8091. Up to 2320 conditions per place. [2023-11-29 01:59:18,215 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 75 selfloop transitions, 8 changer transitions 7/111 dead transitions. [2023-11-29 01:59:18,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 726 flow [2023-11-29 01:59:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2023-11-29 01:59:18,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 01:59:18,217 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2023-11-29 01:59:18,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2023-11-29 01:59:18,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:18,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2023-11-29 01:59:18,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:18,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:18,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:18,219 INFO L175 Difference]: Start difference. First operand has 106 places, 90 transitions, 475 flow. Second operand 4 states and 160 transitions. [2023-11-29 01:59:18,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 726 flow [2023-11-29 01:59:18,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 634 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-29 01:59:18,224 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 404 flow [2023-11-29 01:59:18,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2023-11-29 01:59:18,225 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 29 predicate places. [2023-11-29 01:59:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 404 flow [2023-11-29 01:59:18,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:18,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:59:18,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:18,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1325650841, now seen corresponding path program 1 times [2023-11-29 01:59:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:18,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839999619] [2023-11-29 01:59:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:18,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839999619] [2023-11-29 01:59:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839999619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154489394] [2023-11-29 01:59:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:18,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:18,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:18,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:18,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:59:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:18,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:59:18,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:18,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154489394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:18,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 01:59:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766940572] [2023-11-29 01:59:18,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:59:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:59:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:59:18,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:18,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 404 flow. Second operand has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:18,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:18,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:18,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:19,638 INFO L124 PetriNetUnfolderBase]: 3289/6284 cut-off events. [2023-11-29 01:59:19,638 INFO L125 PetriNetUnfolderBase]: For 2392/2794 co-relation queries the response was YES. [2023-11-29 01:59:19,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14244 conditions, 6284 events. 3289/6284 cut-off events. For 2392/2794 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 44721 event pairs, 2156 based on Foata normal form. 418/6137 useless extension candidates. Maximal degree in co-relation 14223. Up to 2662 conditions per place. [2023-11-29 01:59:19,677 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 106 selfloop transitions, 31 changer transitions 17/174 dead transitions. [2023-11-29 01:59:19,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1121 flow [2023-11-29 01:59:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:59:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 01:59:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 366 transitions. [2023-11-29 01:59:19,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2023-11-29 01:59:19,679 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 366 transitions. [2023-11-29 01:59:19,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 366 transitions. [2023-11-29 01:59:19,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:19,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 366 transitions. [2023-11-29 01:59:19,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 30.5) internal successors, (366), 12 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:19,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 72.0) internal successors, (936), 13 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:19,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 72.0) internal successors, (936), 13 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:19,682 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 404 flow. Second operand 12 states and 366 transitions. [2023-11-29 01:59:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1121 flow [2023-11-29 01:59:19,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 1100 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:59:19,690 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 655 flow [2023-11-29 01:59:19,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=655, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2023-11-29 01:59:19,691 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 44 predicate places. [2023-11-29 01:59:19,691 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 655 flow [2023-11-29 01:59:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:19,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:19,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:19,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:59:19,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:59:19,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:19,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 343553364, now seen corresponding path program 1 times [2023-11-29 01:59:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135606498] [2023-11-29 01:59:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:20,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135606498] [2023-11-29 01:59:20,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135606498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329973980] [2023-11-29 01:59:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:20,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:20,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:20,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:20,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:59:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:20,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:59:20,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:59:20,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:20,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329973980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:20,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:20,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-29 01:59:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489696710] [2023-11-29 01:59:20,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:20,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:59:20,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 01:59:20,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 655 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:20,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 01:59:20,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:20,685 INFO L124 PetriNetUnfolderBase]: 2475/4892 cut-off events. [2023-11-29 01:59:20,685 INFO L125 PetriNetUnfolderBase]: For 2903/3227 co-relation queries the response was YES. [2023-11-29 01:59:20,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11272 conditions, 4892 events. 2475/4892 cut-off events. For 2903/3227 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 34836 event pairs, 2025 based on Foata normal form. 390/4892 useless extension candidates. Maximal degree in co-relation 11244. Up to 3750 conditions per place. [2023-11-29 01:59:20,707 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 83 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-29 01:59:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 105 transitions, 815 flow [2023-11-29 01:59:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:59:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-29 01:59:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-29 01:59:20,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-29 01:59:20,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-29 01:59:20,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:20,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-29 01:59:20,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,710 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 655 flow. Second operand 3 states and 112 transitions. [2023-11-29 01:59:20,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 105 transitions, 815 flow [2023-11-29 01:59:20,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 803 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 01:59:20,716 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 637 flow [2023-11-29 01:59:20,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=637, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2023-11-29 01:59:20,717 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 41 predicate places. [2023-11-29 01:59:20,717 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 637 flow [2023-11-29 01:59:20,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:20,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:20,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:20,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:59:20,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:59:20,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:20,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1884679733, now seen corresponding path program 2 times [2023-11-29 01:59:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126702255] [2023-11-29 01:59:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:21,008 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 01:59:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126702255] [2023-11-29 01:59:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126702255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231611600] [2023-11-29 01:59:21,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:59:21,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:21,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:21,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:21,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:59:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:59:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:21,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:59:21,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:21,146 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 01:59:21,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:21,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231611600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:21,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:21,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-29 01:59:21,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425550433] [2023-11-29 01:59:21,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:21,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:59:21,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:21,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:59:21,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:59:21,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:21,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 637 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:21,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:21,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:21,906 INFO L124 PetriNetUnfolderBase]: 3737/6841 cut-off events. [2023-11-29 01:59:21,906 INFO L125 PetriNetUnfolderBase]: For 3102/3102 co-relation queries the response was YES. [2023-11-29 01:59:21,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16086 conditions, 6841 events. 3737/6841 cut-off events. For 3102/3102 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 47263 event pairs, 1369 based on Foata normal form. 88/6459 useless extension candidates. Maximal degree in co-relation 16057. Up to 2283 conditions per place. [2023-11-29 01:59:21,940 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 111 selfloop transitions, 7 changer transitions 0/134 dead transitions. [2023-11-29 01:59:21,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 134 transitions, 955 flow [2023-11-29 01:59:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:59:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 01:59:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-29 01:59:21,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 01:59:21,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-29 01:59:21,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-29 01:59:21,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:21,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-29 01:59:21,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:21,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 01:59:21,943 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 637 flow. Second operand 4 states and 152 transitions. [2023-11-29 01:59:21,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 134 transitions, 955 flow [2023-11-29 01:59:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 134 transitions, 954 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:59:21,953 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 646 flow [2023-11-29 01:59:21,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=646, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2023-11-29 01:59:21,953 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 42 predicate places. [2023-11-29 01:59:21,953 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 646 flow [2023-11-29 01:59:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:21,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:21,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:21,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:22,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:59:22,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:22,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1862629709, now seen corresponding path program 1 times [2023-11-29 01:59:22,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:22,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909168113] [2023-11-29 01:59:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:22,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:22,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909168113] [2023-11-29 01:59:22,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909168113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782756699] [2023-11-29 01:59:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:22,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:22,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:22,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:59:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:22,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:59:22,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:22,980 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 01:59:23,273 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 01:59:23,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-29 01:59:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:23,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:23,557 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 21 treesize of output 19 [2023-11-29 01:59:23,562 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 28 treesize of output 22 [2023-11-29 01:59:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:23,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782756699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:23,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:23,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-11-29 01:59:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707460832] [2023-11-29 01:59:23,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:23,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:59:23,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:59:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:59:23,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 72 [2023-11-29 01:59:23,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 646 flow. Second operand has 20 states, 20 states have (on average 20.25) internal successors, (405), 20 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 01:59:23,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:23,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 72 [2023-11-29 01:59:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:26,301 INFO L124 PetriNetUnfolderBase]: 8075/13730 cut-off events. [2023-11-29 01:59:26,302 INFO L125 PetriNetUnfolderBase]: For 10102/10952 co-relation queries the response was YES. [2023-11-29 01:59:26,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33863 conditions, 13730 events. 8075/13730 cut-off events. For 10102/10952 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 100530 event pairs, 2724 based on Foata normal form. 572/12944 useless extension candidates. Maximal degree in co-relation 33834. Up to 3259 conditions per place. [2023-11-29 01:59:26,425 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 182 selfloop transitions, 55 changer transitions 9/261 dead transitions. [2023-11-29 01:59:26,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 261 transitions, 1764 flow [2023-11-29 01:59:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:59:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:59:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 452 transitions. [2023-11-29 01:59:26,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2023-11-29 01:59:26,428 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 452 transitions. [2023-11-29 01:59:26,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 452 transitions. [2023-11-29 01:59:26,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:26,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 452 transitions. [2023-11-29 01:59:26,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 30.133333333333333) internal successors, (452), 15 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 72.0) internal successors, (1152), 16 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,434 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 72.0) internal successors, (1152), 16 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:26,434 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 646 flow. Second operand 15 states and 452 transitions. [2023-11-29 01:59:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 261 transitions, 1764 flow [2023-11-29 01:59:26,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 261 transitions, 1690 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 01:59:26,452 INFO L231 Difference]: Finished difference. Result has 127 places, 111 transitions, 818 flow [2023-11-29 01:59:26,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=818, PETRI_PLACES=127, PETRI_TRANSITIONS=111} [2023-11-29 01:59:26,453 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2023-11-29 01:59:26,453 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 111 transitions, 818 flow [2023-11-29 01:59:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.25) internal successors, (405), 20 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 01:59:26,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:26,454 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1] [2023-11-29 01:59:26,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:59:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:59:26,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:26,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash -452964642, now seen corresponding path program 1 times [2023-11-29 01:59:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:26,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784599578] [2023-11-29 01:59:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784599578] [2023-11-29 01:59:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784599578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905240316] [2023-11-29 01:59:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:26,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:26,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:59:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:27,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:59:27,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:27,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905240316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:27,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:27,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-11-29 01:59:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86698253] [2023-11-29 01:59:27,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 01:59:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 01:59:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:59:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 01:59:27,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 111 transitions, 818 flow. Second operand has 28 states, 28 states have (on average 23.071428571428573) internal successors, (646), 28 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:27,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:27,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 01:59:27,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:28,665 INFO L124 PetriNetUnfolderBase]: 4652/9419 cut-off events. [2023-11-29 01:59:28,665 INFO L125 PetriNetUnfolderBase]: For 8380/8984 co-relation queries the response was YES. [2023-11-29 01:59:28,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23894 conditions, 9419 events. 4652/9419 cut-off events. For 8380/8984 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 77304 event pairs, 3671 based on Foata normal form. 325/9264 useless extension candidates. Maximal degree in co-relation 23860. Up to 6988 conditions per place. [2023-11-29 01:59:28,714 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 46 selfloop transitions, 100 changer transitions 0/167 dead transitions. [2023-11-29 01:59:28,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 167 transitions, 1803 flow [2023-11-29 01:59:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:59:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 01:59:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 684 transitions. [2023-11-29 01:59:28,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2023-11-29 01:59:28,717 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 684 transitions. [2023-11-29 01:59:28,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 684 transitions. [2023-11-29 01:59:28,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:28,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 684 transitions. [2023-11-29 01:59:28,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 26.307692307692307) internal successors, (684), 26 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:28,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 72.0) internal successors, (1944), 27 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:28,722 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 72.0) internal successors, (1944), 27 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:28,722 INFO L175 Difference]: Start difference. First operand has 127 places, 111 transitions, 818 flow. Second operand 26 states and 684 transitions. [2023-11-29 01:59:28,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 167 transitions, 1803 flow [2023-11-29 01:59:28,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 167 transitions, 1762 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 01:59:28,762 INFO L231 Difference]: Finished difference. Result has 154 places, 167 transitions, 1740 flow [2023-11-29 01:59:28,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1740, PETRI_PLACES=154, PETRI_TRANSITIONS=167} [2023-11-29 01:59:28,762 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2023-11-29 01:59:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 167 transitions, 1740 flow [2023-11-29 01:59:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.071428571428573) internal successors, (646), 28 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:28,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:59:28,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:28,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:28,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1704471282, now seen corresponding path program 1 times [2023-11-29 01:59:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645241095] [2023-11-29 01:59:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:29,030 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 01:59:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645241095] [2023-11-29 01:59:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645241095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514775498] [2023-11-29 01:59:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:29,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:29,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:29,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:29,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:59:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:29,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:59:29,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:29,171 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 01:59:29,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:29,201 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 01:59:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514775498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:29,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 01:59:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844029432] [2023-11-29 01:59:29,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:59:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:59:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:29,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-29 01:59:29,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 167 transitions, 1740 flow. Second operand has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:29,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:29,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-29 01:59:29,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:31,573 INFO L124 PetriNetUnfolderBase]: 9439/17367 cut-off events. [2023-11-29 01:59:31,574 INFO L125 PetriNetUnfolderBase]: For 14311/14815 co-relation queries the response was YES. [2023-11-29 01:59:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44480 conditions, 17367 events. 9439/17367 cut-off events. For 14311/14815 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 135665 event pairs, 2644 based on Foata normal form. 0/16891 useless extension candidates. Maximal degree in co-relation 44438. Up to 6960 conditions per place. [2023-11-29 01:59:31,784 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 307 selfloop transitions, 13 changer transitions 0/339 dead transitions. [2023-11-29 01:59:31,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 339 transitions, 3050 flow [2023-11-29 01:59:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:59:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 01:59:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 395 transitions. [2023-11-29 01:59:31,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-29 01:59:31,787 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 395 transitions. [2023-11-29 01:59:31,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 395 transitions. [2023-11-29 01:59:31,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:31,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 395 transitions. [2023-11-29 01:59:31,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.5) internal successors, (395), 10 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:31,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:31,791 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:31,791 INFO L175 Difference]: Start difference. First operand has 154 places, 167 transitions, 1740 flow. Second operand 10 states and 395 transitions. [2023-11-29 01:59:31,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 339 transitions, 3050 flow [2023-11-29 01:59:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 339 transitions, 2759 flow, removed 92 selfloop flow, removed 12 redundant places. [2023-11-29 01:59:31,839 INFO L231 Difference]: Finished difference. Result has 154 places, 176 transitions, 1529 flow [2023-11-29 01:59:31,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1529, PETRI_PLACES=154, PETRI_TRANSITIONS=176} [2023-11-29 01:59:31,840 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2023-11-29 01:59:31,840 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 176 transitions, 1529 flow [2023-11-29 01:59:31,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:31,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:31,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:31,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:59:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:32,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:32,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1906945256, now seen corresponding path program 1 times [2023-11-29 01:59:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527256053] [2023-11-29 01:59:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:32,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:32,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527256053] [2023-11-29 01:59:32,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527256053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:32,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428939333] [2023-11-29 01:59:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:32,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:32,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:32,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:59:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:32,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:59:32,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:32,672 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 01:59:32,966 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 01:59:32,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-29 01:59:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:32,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:33,251 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 01:59:33,256 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 01:59:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428939333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:33,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:33,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-11-29 01:59:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841759224] [2023-11-29 01:59:33,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:59:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:59:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:59:33,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 72 [2023-11-29 01:59:33,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 176 transitions, 1529 flow. Second operand has 20 states, 20 states have (on average 21.25) internal successors, (425), 20 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:33,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:33,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 72 [2023-11-29 01:59:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:36,346 INFO L124 PetriNetUnfolderBase]: 9685/16478 cut-off events. [2023-11-29 01:59:36,346 INFO L125 PetriNetUnfolderBase]: For 19023/19876 co-relation queries the response was YES. [2023-11-29 01:59:36,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 16478 events. 9685/16478 cut-off events. For 19023/19876 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 120986 event pairs, 3442 based on Foata normal form. 448/16562 useless extension candidates. Maximal degree in co-relation 46900. Up to 5095 conditions per place. [2023-11-29 01:59:36,474 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 235 selfloop transitions, 103 changer transitions 12/371 dead transitions. [2023-11-29 01:59:36,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 371 transitions, 3143 flow [2023-11-29 01:59:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:59:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 01:59:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 461 transitions. [2023-11-29 01:59:36,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42685185185185187 [2023-11-29 01:59:36,476 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 461 transitions. [2023-11-29 01:59:36,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 461 transitions. [2023-11-29 01:59:36,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:36,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 461 transitions. [2023-11-29 01:59:36,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 30.733333333333334) internal successors, (461), 15 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:36,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 72.0) internal successors, (1152), 16 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:36,480 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 72.0) internal successors, (1152), 16 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:36,480 INFO L175 Difference]: Start difference. First operand has 154 places, 176 transitions, 1529 flow. Second operand 15 states and 461 transitions. [2023-11-29 01:59:36,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 371 transitions, 3143 flow [2023-11-29 01:59:36,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 371 transitions, 2981 flow, removed 67 selfloop flow, removed 3 redundant places. [2023-11-29 01:59:36,530 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 1719 flow [2023-11-29 01:59:36,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1719, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2023-11-29 01:59:36,531 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 97 predicate places. [2023-11-29 01:59:36,531 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 1719 flow [2023-11-29 01:59:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.25) internal successors, (425), 20 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:36,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:36,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:36,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:59:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:59:36,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:36,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1864520870, now seen corresponding path program 1 times [2023-11-29 01:59:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:36,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582651878] [2023-11-29 01:59:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582651878] [2023-11-29 01:59:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582651878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:37,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090212145] [2023-11-29 01:59:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:37,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:37,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:37,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:59:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:37,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:59:37,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:37,467 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 01:59:37,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-29 01:59:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:37,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:38,256 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 21 treesize of output 19 [2023-11-29 01:59:38,260 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 28 treesize of output 22 [2023-11-29 01:59:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:59:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090212145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:38,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 01:59:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207214433] [2023-11-29 01:59:38,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:59:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:59:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:59:38,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 72 [2023-11-29 01:59:38,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 1719 flow. Second operand has 23 states, 23 states have (on average 20.608695652173914) internal successors, (474), 23 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:38,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:38,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 72 [2023-11-29 01:59:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:44,411 INFO L124 PetriNetUnfolderBase]: 18366/31481 cut-off events. [2023-11-29 01:59:44,411 INFO L125 PetriNetUnfolderBase]: For 34223/36212 co-relation queries the response was YES. [2023-11-29 01:59:44,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87747 conditions, 31481 events. 18366/31481 cut-off events. For 34223/36212 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 256177 event pairs, 4408 based on Foata normal form. 0/29551 useless extension candidates. Maximal degree in co-relation 87701. Up to 4484 conditions per place. [2023-11-29 01:59:44,749 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 325 selfloop transitions, 109 changer transitions 12/467 dead transitions. [2023-11-29 01:59:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 467 transitions, 3808 flow [2023-11-29 01:59:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:59:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 01:59:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 560 transitions. [2023-11-29 01:59:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-11-29 01:59:44,751 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 560 transitions. [2023-11-29 01:59:44,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 560 transitions. [2023-11-29 01:59:44,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:44,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 560 transitions. [2023-11-29 01:59:44,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 31.11111111111111) internal successors, (560), 18 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,755 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:44,755 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 1719 flow. Second operand 18 states and 560 transitions. [2023-11-29 01:59:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 467 transitions, 3808 flow [2023-11-29 01:59:45,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 467 transitions, 3666 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-11-29 01:59:45,037 INFO L231 Difference]: Finished difference. Result has 179 places, 188 transitions, 1964 flow [2023-11-29 01:59:45,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1964, PETRI_PLACES=179, PETRI_TRANSITIONS=188} [2023-11-29 01:59:45,038 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 109 predicate places. [2023-11-29 01:59:45,038 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 188 transitions, 1964 flow [2023-11-29 01:59:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 20.608695652173914) internal successors, (474), 23 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:45,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:45,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:45,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:59:45,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:59:45,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:45,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:45,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1141813007, now seen corresponding path program 2 times [2023-11-29 01:59:45,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:45,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290519061] [2023-11-29 01:59:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:45,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:59:46,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290519061] [2023-11-29 01:59:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290519061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723118515] [2023-11-29 01:59:46,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:59:46,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:46,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:46,149 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:46,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:59:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:59:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:46,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:59:46,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 01:59:46,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:59:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723118515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:46,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-11-29 01:59:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475066633] [2023-11-29 01:59:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:59:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:59:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:59:46,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2023-11-29 01:59:46,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 1964 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:46,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:46,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2023-11-29 01:59:46,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:50,619 INFO L124 PetriNetUnfolderBase]: 16997/31854 cut-off events. [2023-11-29 01:59:50,619 INFO L125 PetriNetUnfolderBase]: For 36098/37386 co-relation queries the response was YES. [2023-11-29 01:59:50,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90824 conditions, 31854 events. 16997/31854 cut-off events. For 36098/37386 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 280978 event pairs, 2674 based on Foata normal form. 704/32034 useless extension candidates. Maximal degree in co-relation 90772. Up to 16325 conditions per place. [2023-11-29 01:59:50,964 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 218 selfloop transitions, 7 changer transitions 0/250 dead transitions. [2023-11-29 01:59:50,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 250 transitions, 2680 flow [2023-11-29 01:59:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:59:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:59:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 198 transitions. [2023-11-29 01:59:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-29 01:59:50,966 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 198 transitions. [2023-11-29 01:59:50,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 198 transitions. [2023-11-29 01:59:50,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:59:50,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 198 transitions. [2023-11-29 01:59:50,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.6) internal successors, (198), 5 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:50,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 01:59:50,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 01:59:50,967 INFO L175 Difference]: Start difference. First operand has 179 places, 188 transitions, 1964 flow. Second operand 5 states and 198 transitions. [2023-11-29 01:59:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 250 transitions, 2680 flow [2023-11-29 01:59:51,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 250 transitions, 2560 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-29 01:59:51,490 INFO L231 Difference]: Finished difference. Result has 177 places, 190 transitions, 1878 flow [2023-11-29 01:59:51,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1878, PETRI_PLACES=177, PETRI_TRANSITIONS=190} [2023-11-29 01:59:51,491 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 107 predicate places. [2023-11-29 01:59:51,491 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 190 transitions, 1878 flow [2023-11-29 01:59:51,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:51,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:59:51,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:51,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:59:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:51,692 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 01:59:51,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -446285251, now seen corresponding path program 1 times [2023-11-29 01:59:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665250533] [2023-11-29 01:59:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:59:52,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665250533] [2023-11-29 01:59:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665250533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788329565] [2023-11-29 01:59:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:52,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:52,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:52,128 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:52,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:59:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:52,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:59:52,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:59:52,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:52,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:52,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-29 01:59:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:59:53,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788329565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:53,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:53,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 01:59:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726056768] [2023-11-29 01:59:53,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:59:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:59:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:59:53,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 72 [2023-11-29 01:59:53,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 190 transitions, 1878 flow. Second operand has 20 states, 20 states have (on average 19.55) internal successors, (391), 20 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:53,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:59:53,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 72 [2023-11-29 01:59:53,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:59:59,571 INFO L124 PetriNetUnfolderBase]: 24408/40737 cut-off events. [2023-11-29 01:59:59,572 INFO L125 PetriNetUnfolderBase]: For 51203/52625 co-relation queries the response was YES. [2023-11-29 01:59:59,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122811 conditions, 40737 events. 24408/40737 cut-off events. For 51203/52625 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 328828 event pairs, 1788 based on Foata normal form. 212/40377 useless extension candidates. Maximal degree in co-relation 122756. Up to 15183 conditions per place. [2023-11-29 02:00:00,072 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 354 selfloop transitions, 27 changer transitions 23/423 dead transitions. [2023-11-29 02:00:00,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 423 transitions, 3994 flow [2023-11-29 02:00:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:00:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:00:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 499 transitions. [2023-11-29 02:00:00,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38503086419753085 [2023-11-29 02:00:00,074 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 499 transitions. [2023-11-29 02:00:00,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 499 transitions. [2023-11-29 02:00:00,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:00,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 499 transitions. [2023-11-29 02:00:00,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 27.72222222222222) internal successors, (499), 18 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:00,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:00,078 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:00,079 INFO L175 Difference]: Start difference. First operand has 177 places, 190 transitions, 1878 flow. Second operand 18 states and 499 transitions. [2023-11-29 02:00:00,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 423 transitions, 3994 flow [2023-11-29 02:00:00,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 423 transitions, 3883 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:00,999 INFO L231 Difference]: Finished difference. Result has 194 places, 200 transitions, 1928 flow [2023-11-29 02:00:01,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1928, PETRI_PLACES=194, PETRI_TRANSITIONS=200} [2023-11-29 02:00:01,000 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 124 predicate places. [2023-11-29 02:00:01,000 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 200 transitions, 1928 flow [2023-11-29 02:00:01,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.55) internal successors, (391), 20 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:01,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:01,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:01,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:00:01,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:01,201 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:01,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1204293678, now seen corresponding path program 1 times [2023-11-29 02:00:01,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:01,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452553234] [2023-11-29 02:00:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:01,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:01,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452553234] [2023-11-29 02:00:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452553234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273235832] [2023-11-29 02:00:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:01,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:01,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:01,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:00:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:01,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:00:01,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:01,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:00:02,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 02:00:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:02,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:02,755 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 02:00:02,759 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 02:00:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:02,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273235832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:02,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:02,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 02:00:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683773046] [2023-11-29 02:00:02,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:00:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:00:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:00:03,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 72 [2023-11-29 02:00:03,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 200 transitions, 1928 flow. Second operand has 23 states, 23 states have (on average 21.608695652173914) internal successors, (497), 23 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:03,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:03,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 72 [2023-11-29 02:00:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:09,043 INFO L124 PetriNetUnfolderBase]: 16793/30172 cut-off events. [2023-11-29 02:00:09,043 INFO L125 PetriNetUnfolderBase]: For 54099/55936 co-relation queries the response was YES. [2023-11-29 02:00:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97818 conditions, 30172 events. 16793/30172 cut-off events. For 54099/55936 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 255670 event pairs, 4994 based on Foata normal form. 634/30672 useless extension candidates. Maximal degree in co-relation 97760. Up to 5028 conditions per place. [2023-11-29 02:00:09,426 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 375 selfloop transitions, 110 changer transitions 15/524 dead transitions. [2023-11-29 02:00:09,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 524 transitions, 4647 flow [2023-11-29 02:00:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:00:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:00:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 572 transitions. [2023-11-29 02:00:09,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2023-11-29 02:00:09,429 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 572 transitions. [2023-11-29 02:00:09,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 572 transitions. [2023-11-29 02:00:09,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:09,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 572 transitions. [2023-11-29 02:00:09,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 31.77777777777778) internal successors, (572), 18 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:09,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:09,434 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:09,434 INFO L175 Difference]: Start difference. First operand has 194 places, 200 transitions, 1928 flow. Second operand 18 states and 572 transitions. [2023-11-29 02:00:09,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 524 transitions, 4647 flow [2023-11-29 02:00:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 524 transitions, 4558 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-11-29 02:00:09,911 INFO L231 Difference]: Finished difference. Result has 205 places, 202 transitions, 2141 flow [2023-11-29 02:00:09,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2141, PETRI_PLACES=205, PETRI_TRANSITIONS=202} [2023-11-29 02:00:09,911 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 135 predicate places. [2023-11-29 02:00:09,912 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 202 transitions, 2141 flow [2023-11-29 02:00:09,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 21.608695652173914) internal successors, (497), 23 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:09,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:09,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:09,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:00:10,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:00:10,113 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:10,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:10,113 INFO L85 PathProgramCache]: Analyzing trace with hash -275244553, now seen corresponding path program 1 times [2023-11-29 02:00:10,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:10,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802473185] [2023-11-29 02:00:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802473185] [2023-11-29 02:00:10,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802473185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191311804] [2023-11-29 02:00:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:10,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:10,275 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:10,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:00:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:10,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:00:10,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:00:10,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:10,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191311804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:10,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:10,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-29 02:00:10,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237240195] [2023-11-29 02:00:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:10,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:10,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:00:10,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 02:00:10,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 202 transitions, 2141 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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 02:00:10,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:10,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 02:00:10,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:16,657 INFO L124 PetriNetUnfolderBase]: 20196/40733 cut-off events. [2023-11-29 02:00:16,657 INFO L125 PetriNetUnfolderBase]: For 86037/87613 co-relation queries the response was YES. [2023-11-29 02:00:17,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130314 conditions, 40733 events. 20196/40733 cut-off events. For 86037/87613 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 382285 event pairs, 4844 based on Foata normal form. 702/40996 useless extension candidates. Maximal degree in co-relation 130254. Up to 12028 conditions per place. [2023-11-29 02:00:17,334 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 248 selfloop transitions, 15 changer transitions 0/291 dead transitions. [2023-11-29 02:00:17,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 291 transitions, 3179 flow [2023-11-29 02:00:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2023-11-29 02:00:17,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2023-11-29 02:00:17,335 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 182 transitions. [2023-11-29 02:00:17,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 182 transitions. [2023-11-29 02:00:17,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:17,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 182 transitions. [2023-11-29 02:00:17,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:17,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 02:00:17,336 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 02:00:17,336 INFO L175 Difference]: Start difference. First operand has 205 places, 202 transitions, 2141 flow. Second operand 4 states and 182 transitions. [2023-11-29 02:00:17,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 291 transitions, 3179 flow [2023-11-29 02:00:18,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 291 transitions, 2984 flow, removed 3 selfloop flow, removed 14 redundant places. [2023-11-29 02:00:18,256 INFO L231 Difference]: Finished difference. Result has 195 places, 207 transitions, 2102 flow [2023-11-29 02:00:18,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2102, PETRI_PLACES=195, PETRI_TRANSITIONS=207} [2023-11-29 02:00:18,256 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 125 predicate places. [2023-11-29 02:00:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 207 transitions, 2102 flow [2023-11-29 02:00:18,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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 02:00:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:18,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:18,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 02:00:18,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:18,457 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:18,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash 239022966, now seen corresponding path program 2 times [2023-11-29 02:00:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:18,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164788287] [2023-11-29 02:00:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:18,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:00:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164788287] [2023-11-29 02:00:18,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164788287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182286979] [2023-11-29 02:00:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:00:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:18,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:18,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:00:19,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:00:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:19,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:00:19,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:00:19,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182286979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:19,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:19,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-29 02:00:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718185777] [2023-11-29 02:00:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:19,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:00:19,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:00:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:00:19,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2023-11-29 02:00:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 207 transitions, 2102 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2023-11-29 02:00:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:26,112 INFO L124 PetriNetUnfolderBase]: 25543/46732 cut-off events. [2023-11-29 02:00:26,112 INFO L125 PetriNetUnfolderBase]: For 113641/116585 co-relation queries the response was YES. [2023-11-29 02:00:26,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154940 conditions, 46732 events. 25543/46732 cut-off events. For 113641/116585 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 409953 event pairs, 5336 based on Foata normal form. 704/46422 useless extension candidates. Maximal degree in co-relation 154879. Up to 29115 conditions per place. [2023-11-29 02:00:26,694 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 234 selfloop transitions, 14 changer transitions 0/274 dead transitions. [2023-11-29 02:00:26,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 274 transitions, 2933 flow [2023-11-29 02:00:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:00:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:00:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2023-11-29 02:00:26,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2023-11-29 02:00:26,696 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 196 transitions. [2023-11-29 02:00:26,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 196 transitions. [2023-11-29 02:00:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 196 transitions. [2023-11-29 02:00:26,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:26,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 02:00:26,698 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 02:00:26,698 INFO L175 Difference]: Start difference. First operand has 195 places, 207 transitions, 2102 flow. Second operand 5 states and 196 transitions. [2023-11-29 02:00:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 274 transitions, 2933 flow [2023-11-29 02:00:27,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 274 transitions, 2899 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-11-29 02:00:27,824 INFO L231 Difference]: Finished difference. Result has 200 places, 210 transitions, 2152 flow [2023-11-29 02:00:27,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2152, PETRI_PLACES=200, PETRI_TRANSITIONS=210} [2023-11-29 02:00:27,825 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 130 predicate places. [2023-11-29 02:00:27,825 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 210 transitions, 2152 flow [2023-11-29 02:00:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:27,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:27,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:27,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 02:00:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:28,026 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:28,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1753004160, now seen corresponding path program 1 times [2023-11-29 02:00:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:28,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632593981] [2023-11-29 02:00:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:28,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:00:28,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632593981] [2023-11-29 02:00:28,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632593981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723424124] [2023-11-29 02:00:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:28,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:28,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:28,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:28,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:00:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:29,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:00:29,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:00:29,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723424124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-29 02:00:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029185910] [2023-11-29 02:00:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:00:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:00:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:00:29,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2023-11-29 02:00:29,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 210 transitions, 2152 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:29,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2023-11-29 02:00:29,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:36,472 INFO L124 PetriNetUnfolderBase]: 26676/49179 cut-off events. [2023-11-29 02:00:36,472 INFO L125 PetriNetUnfolderBase]: For 120118/122662 co-relation queries the response was YES. [2023-11-29 02:00:36,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163421 conditions, 49179 events. 26676/49179 cut-off events. For 120118/122662 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 440495 event pairs, 9976 based on Foata normal form. 100/48392 useless extension candidates. Maximal degree in co-relation 163357. Up to 34416 conditions per place. [2023-11-29 02:00:37,096 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 216 selfloop transitions, 7 changer transitions 1/250 dead transitions. [2023-11-29 02:00:37,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 250 transitions, 2751 flow [2023-11-29 02:00:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:00:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:00:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2023-11-29 02:00:37,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 02:00:37,097 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 192 transitions. [2023-11-29 02:00:37,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 192 transitions. [2023-11-29 02:00:37,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:37,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 192 transitions. [2023-11-29 02:00:37,098 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 02:00:37,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 02:00:37,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 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 02:00:37,099 INFO L175 Difference]: Start difference. First operand has 200 places, 210 transitions, 2152 flow. Second operand 5 states and 192 transitions. [2023-11-29 02:00:37,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 250 transitions, 2751 flow [2023-11-29 02:00:38,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 250 transitions, 2732 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:38,172 INFO L231 Difference]: Finished difference. Result has 202 places, 210 transitions, 2151 flow [2023-11-29 02:00:38,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2151, PETRI_PLACES=202, PETRI_TRANSITIONS=210} [2023-11-29 02:00:38,172 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 132 predicate places. [2023-11-29 02:00:38,172 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 210 transitions, 2151 flow [2023-11-29 02:00:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:38,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:38,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:38,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:00:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:00:38,373 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -103179478, now seen corresponding path program 1 times [2023-11-29 02:00:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860499350] [2023-11-29 02:00:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:00:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860499350] [2023-11-29 02:00:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860499350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:38,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845793090] [2023-11-29 02:00:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:38,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-11-29 02:00:38,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 210 transitions, 2151 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:38,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:38,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-11-29 02:00:38,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:46,929 INFO L124 PetriNetUnfolderBase]: 26133/53186 cut-off events. [2023-11-29 02:00:46,929 INFO L125 PetriNetUnfolderBase]: For 128445/131053 co-relation queries the response was YES. [2023-11-29 02:00:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172946 conditions, 53186 events. 26133/53186 cut-off events. For 128445/131053 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 526583 event pairs, 6946 based on Foata normal form. 676/52611 useless extension candidates. Maximal degree in co-relation 172881. Up to 15488 conditions per place. [2023-11-29 02:00:47,766 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 244 selfloop transitions, 14 changer transitions 12/298 dead transitions. [2023-11-29 02:00:47,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 298 transitions, 3228 flow [2023-11-29 02:00:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2023-11-29 02:00:47,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 02:00:47,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 176 transitions. [2023-11-29 02:00:47,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 176 transitions. [2023-11-29 02:00:47,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:47,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 176 transitions. [2023-11-29 02:00:47,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:47,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 02:00:47,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 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 02:00:47,769 INFO L175 Difference]: Start difference. First operand has 202 places, 210 transitions, 2151 flow. Second operand 4 states and 176 transitions. [2023-11-29 02:00:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 298 transitions, 3228 flow [2023-11-29 02:00:49,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 3218 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:49,572 INFO L231 Difference]: Finished difference. Result has 205 places, 214 transitions, 2229 flow [2023-11-29 02:00:49,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2229, PETRI_PLACES=205, PETRI_TRANSITIONS=214} [2023-11-29 02:00:49,572 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 135 predicate places. [2023-11-29 02:00:49,572 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 214 transitions, 2229 flow [2023-11-29 02:00:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:49,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:49,573 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:49,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 02:00:49,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:00:49,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1033408618, now seen corresponding path program 2 times [2023-11-29 02:00:49,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:49,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534346539] [2023-11-29 02:00:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:49,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534346539] [2023-11-29 02:00:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534346539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659647635] [2023-11-29 02:00:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:00:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:52,143 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:00:52,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:00:52,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:52,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:00:52,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:52,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:52,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2023-11-29 02:00:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:00:52,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659647635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 21 [2023-11-29 02:00:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623040462] [2023-11-29 02:00:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:00:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:00:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:00:52,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-29 02:00:52,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 214 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:52,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-29 02:00:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:03,597 INFO L124 PetriNetUnfolderBase]: 37104/67977 cut-off events. [2023-11-29 02:01:03,597 INFO L125 PetriNetUnfolderBase]: For 188656/193084 co-relation queries the response was YES. [2023-11-29 02:01:04,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232402 conditions, 67977 events. 37104/67977 cut-off events. For 188656/193084 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 617287 event pairs, 7042 based on Foata normal form. 2260/69790 useless extension candidates. Maximal degree in co-relation 232335. Up to 24140 conditions per place. [2023-11-29 02:01:04,607 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 293 selfloop transitions, 22 changer transitions 7/346 dead transitions. [2023-11-29 02:01:04,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 346 transitions, 3635 flow [2023-11-29 02:01:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:01:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:01:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 294 transitions. [2023-11-29 02:01:04,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-29 02:01:04,609 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 294 transitions. [2023-11-29 02:01:04,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 294 transitions. [2023-11-29 02:01:04,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:04,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 294 transitions. [2023-11-29 02:01:04,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.75) internal successors, (294), 8 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:04,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 72.0) internal successors, (648), 9 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:04,610 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 72.0) internal successors, (648), 9 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:04,611 INFO L175 Difference]: Start difference. First operand has 205 places, 214 transitions, 2229 flow. Second operand 8 states and 294 transitions. [2023-11-29 02:01:04,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 346 transitions, 3635 flow [2023-11-29 02:01:06,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 3613 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-11-29 02:01:06,871 INFO L231 Difference]: Finished difference. Result has 215 places, 220 transitions, 2360 flow [2023-11-29 02:01:06,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2360, PETRI_PLACES=215, PETRI_TRANSITIONS=220} [2023-11-29 02:01:06,872 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 145 predicate places. [2023-11-29 02:01:06,872 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 220 transitions, 2360 flow [2023-11-29 02:01:06,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:06,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:06,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:06,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:01:07,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:01:07,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:01:07,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash 643567878, now seen corresponding path program 1 times [2023-11-29 02:01:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635837868] [2023-11-29 02:01:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:09,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:09,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635837868] [2023-11-29 02:01:09,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635837868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:09,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966293327] [2023-11-29 02:01:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:09,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:09,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:01:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:10,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 02:01:10,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:10,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:01:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:01:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 02:01:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:01:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:10,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:01:10,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:01:10,526 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:01:10,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 02:01:10,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 02:01:10,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 02:01:10,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 02:01:11,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:11,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2023-11-29 02:01:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:01:11,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:12,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:12,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 55 [2023-11-29 02:01:12,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:12,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-11-29 02:01:12,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:12,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 100 [2023-11-29 02:01:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:01:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966293327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:14,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:01:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 37 [2023-11-29 02:01:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732033484] [2023-11-29 02:01:14,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:01:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:01:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1361, Unknown=1, NotChecked=0, Total=1482 [2023-11-29 02:01:15,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2023-11-29 02:01:15,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 220 transitions, 2360 flow. Second operand has 39 states, 39 states have (on average 12.153846153846153) internal successors, (474), 39 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:15,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:15,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2023-11-29 02:01:15,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:26,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:30,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:38,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:47,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:51,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:55,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:01:59,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:04,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:08,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:17,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:21,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:25,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:29,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:34,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:38,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 02:02:43,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:47,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:51,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:55,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:02:59,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:03:05,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:03:09,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:03:14,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:03:46,973 INFO L124 PetriNetUnfolderBase]: 126889/189064 cut-off events. [2023-11-29 02:03:46,973 INFO L125 PetriNetUnfolderBase]: For 557492/568224 co-relation queries the response was YES. [2023-11-29 02:03:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689517 conditions, 189064 events. 126889/189064 cut-off events. For 557492/568224 co-relation queries the response was YES. Maximal size of possible extension queue 3855. Compared 1490778 event pairs, 54850 based on Foata normal form. 122/188666 useless extension candidates. Maximal degree in co-relation 689445. Up to 105308 conditions per place. [2023-11-29 02:03:49,835 INFO L140 encePairwiseOnDemand]: 57/72 looper letters, 399 selfloop transitions, 195 changer transitions 38/642 dead transitions. [2023-11-29 02:03:49,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 642 transitions, 6351 flow [2023-11-29 02:03:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 02:03:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 02:03:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 803 transitions. [2023-11-29 02:03:49,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24245169082125603 [2023-11-29 02:03:49,837 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 803 transitions. [2023-11-29 02:03:49,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 803 transitions. [2023-11-29 02:03:49,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:49,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 803 transitions. [2023-11-29 02:03:49,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.456521739130434) internal successors, (803), 46 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:49,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 72.0) internal successors, (3384), 47 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:49,845 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 72.0) internal successors, (3384), 47 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:49,846 INFO L175 Difference]: Start difference. First operand has 215 places, 220 transitions, 2360 flow. Second operand 46 states and 803 transitions. [2023-11-29 02:03:49,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 642 transitions, 6351 flow [2023-11-29 02:04:08,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 642 transitions, 6292 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-29 02:04:08,089 INFO L231 Difference]: Finished difference. Result has 270 places, 321 transitions, 4235 flow [2023-11-29 02:04:08,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4235, PETRI_PLACES=270, PETRI_TRANSITIONS=321} [2023-11-29 02:04:08,090 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 200 predicate places. [2023-11-29 02:04:08,090 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 321 transitions, 4235 flow [2023-11-29 02:04:08,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 12.153846153846153) internal successors, (474), 39 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:08,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:04:08,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:08,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:04:08,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:04:08,291 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:04:08,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash -721819598, now seen corresponding path program 2 times [2023-11-29 02:04:08,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:08,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074872837] [2023-11-29 02:04:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:08,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:04:09,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:09,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074872837] [2023-11-29 02:04:09,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074872837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:09,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342833882] [2023-11-29 02:04:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:04:09,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:09,886 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:09,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:04:10,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:04:10,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:04:10,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:04:10,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:10,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:10,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2023-11-29 02:04:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:04:10,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:04:10,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342833882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:04:10,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:04:10,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 16 [2023-11-29 02:04:10,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395784806] [2023-11-29 02:04:10,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:04:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:04:10,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:04:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:04:10,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-29 02:04:10,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 321 transitions, 4235 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:10,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:10,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-29 02:04:10,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:04:28,888 INFO L124 PetriNetUnfolderBase]: 53149/96586 cut-off events. [2023-11-29 02:04:28,889 INFO L125 PetriNetUnfolderBase]: For 362844/369630 co-relation queries the response was YES. [2023-11-29 02:04:30,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355853 conditions, 96586 events. 53149/96586 cut-off events. For 362844/369630 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 922632 event pairs, 9500 based on Foata normal form. 996/96982 useless extension candidates. Maximal degree in co-relation 355768. Up to 30615 conditions per place. [2023-11-29 02:04:30,650 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 375 selfloop transitions, 33 changer transitions 10/445 dead transitions. [2023-11-29 02:04:30,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 445 transitions, 5733 flow [2023-11-29 02:04:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:04:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:04:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 269 transitions. [2023-11-29 02:04:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2023-11-29 02:04:30,651 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 269 transitions. [2023-11-29 02:04:30,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 269 transitions. [2023-11-29 02:04:30,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:04:30,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 269 transitions. [2023-11-29 02:04:30,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:30,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:30,653 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:30,653 INFO L175 Difference]: Start difference. First operand has 270 places, 321 transitions, 4235 flow. Second operand 7 states and 269 transitions. [2023-11-29 02:04:30,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 445 transitions, 5733 flow [2023-11-29 02:04:37,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 445 transitions, 5613 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-29 02:04:37,456 INFO L231 Difference]: Finished difference. Result has 265 places, 313 transitions, 4087 flow [2023-11-29 02:04:37,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4087, PETRI_PLACES=265, PETRI_TRANSITIONS=313} [2023-11-29 02:04:37,457 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 195 predicate places. [2023-11-29 02:04:37,457 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 313 transitions, 4087 flow [2023-11-29 02:04:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:37,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:04:37,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:37,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:04:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:04:37,657 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:04:37,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1524231374, now seen corresponding path program 1 times [2023-11-29 02:04:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:37,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046413768] [2023-11-29 02:04:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:37,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:40,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046413768] [2023-11-29 02:04:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046413768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133149410] [2023-11-29 02:04:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:40,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:40,728 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:40,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:04:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:40,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:04:40,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:41,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:41,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2023-11-29 02:04:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:04:41,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:42,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:42,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 105 [2023-11-29 02:04:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:04:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133149410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:04:46,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:04:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 35 [2023-11-29 02:04:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35959566] [2023-11-29 02:04:46,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:04:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:04:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:04:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1203, Unknown=1, NotChecked=0, Total=1332 [2023-11-29 02:04:51,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:55,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:56,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 72 [2023-11-29 02:04:56,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 313 transitions, 4087 flow. Second operand has 37 states, 37 states have (on average 18.0) internal successors, (666), 37 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:56,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:56,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 72 [2023-11-29 02:04:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:05:02,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:05:06,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:05:11,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:05:15,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:05:40,773 INFO L124 PetriNetUnfolderBase]: 73294/121275 cut-off events. [2023-11-29 02:05:40,774 INFO L125 PetriNetUnfolderBase]: For 524632/531976 co-relation queries the response was YES. [2023-11-29 02:05:42,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465462 conditions, 121275 events. 73294/121275 cut-off events. For 524632/531976 co-relation queries the response was YES. Maximal size of possible extension queue 2858. Compared 1077527 event pairs, 30282 based on Foata normal form. 352/120985 useless extension candidates. Maximal degree in co-relation 465377. Up to 97195 conditions per place. [2023-11-29 02:05:42,938 INFO L140 encePairwiseOnDemand]: 58/72 looper letters, 311 selfloop transitions, 27 changer transitions 141/497 dead transitions. [2023-11-29 02:05:42,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 497 transitions, 5761 flow [2023-11-29 02:05:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:05:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 02:05:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 807 transitions. [2023-11-29 02:05:42,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202380952380952 [2023-11-29 02:05:42,940 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 807 transitions. [2023-11-29 02:05:42,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 807 transitions. [2023-11-29 02:05:42,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:05:42,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 807 transitions. [2023-11-29 02:05:42,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 23.057142857142857) internal successors, (807), 35 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:42,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 72.0) internal successors, (2592), 36 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:42,945 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 72.0) internal successors, (2592), 36 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:42,945 INFO L175 Difference]: Start difference. First operand has 265 places, 313 transitions, 4087 flow. Second operand 35 states and 807 transitions. [2023-11-29 02:05:42,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 497 transitions, 5761 flow [2023-11-29 02:05:50,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 497 transitions, 5671 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-29 02:05:50,710 INFO L231 Difference]: Finished difference. Result has 289 places, 290 transitions, 3833 flow [2023-11-29 02:05:50,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3833, PETRI_PLACES=289, PETRI_TRANSITIONS=290} [2023-11-29 02:05:50,711 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 219 predicate places. [2023-11-29 02:05:50,711 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 290 transitions, 3833 flow [2023-11-29 02:05:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 18.0) internal successors, (666), 37 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:50,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:05:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:50,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 02:05:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:05:50,912 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:05:50,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1638452975, now seen corresponding path program 1 times [2023-11-29 02:05:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179543277] [2023-11-29 02:05:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:05:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179543277] [2023-11-29 02:05:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179543277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472923284] [2023-11-29 02:05:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:51,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:51,013 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:51,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:05:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:05:51,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:05:51,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:05:51,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472923284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:51,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 02:05:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839907032] [2023-11-29 02:05:51,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:05:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:05:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:05:51,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-29 02:05:51,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 290 transitions, 3833 flow. Second operand has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:05:51,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-29 02:05:51,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:06:03,895 INFO L124 PetriNetUnfolderBase]: 32280/64162 cut-off events. [2023-11-29 02:06:03,895 INFO L125 PetriNetUnfolderBase]: For 272429/276891 co-relation queries the response was YES. [2023-11-29 02:06:04,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237149 conditions, 64162 events. 32280/64162 cut-off events. For 272429/276891 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 640155 event pairs, 20980 based on Foata normal form. 648/64284 useless extension candidates. Maximal degree in co-relation 237064. Up to 39618 conditions per place. [2023-11-29 02:06:04,998 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 173 selfloop transitions, 145 changer transitions 31/378 dead transitions. [2023-11-29 02:06:04,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 378 transitions, 5045 flow [2023-11-29 02:06:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:06:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 02:06:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2023-11-29 02:06:05,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 02:06:05,000 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 288 transitions. [2023-11-29 02:06:05,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 288 transitions. [2023-11-29 02:06:05,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:06:05,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 288 transitions. [2023-11-29 02:06:05,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 32.0) internal successors, (288), 9 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:05,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 72.0) internal successors, (720), 10 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:05,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 72.0) internal successors, (720), 10 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:05,001 INFO L175 Difference]: Start difference. First operand has 289 places, 290 transitions, 3833 flow. Second operand 9 states and 288 transitions. [2023-11-29 02:06:05,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 378 transitions, 5045 flow [2023-11-29 02:06:08,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 378 transitions, 4865 flow, removed 15 selfloop flow, removed 32 redundant places. [2023-11-29 02:06:08,204 INFO L231 Difference]: Finished difference. Result has 244 places, 285 transitions, 3929 flow [2023-11-29 02:06:08,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3929, PETRI_PLACES=244, PETRI_TRANSITIONS=285} [2023-11-29 02:06:08,205 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 174 predicate places. [2023-11-29 02:06:08,205 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 285 transitions, 3929 flow [2023-11-29 02:06:08,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.333333333333332) internal successors, (365), 15 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:08,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:06:08,205 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:08,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:06:08,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:08,406 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:06:08,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -922756796, now seen corresponding path program 2 times [2023-11-29 02:06:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266722568] [2023-11-29 02:06:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:08,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:06:08,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266722568] [2023-11-29 02:06:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266722568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:08,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747317482] [2023-11-29 02:06:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:06:08,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:08,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:08,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:06:08,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:06:08,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:08,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:06:08,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 02:06:08,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 02:06:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747317482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:08,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3, 3] total 12 [2023-11-29 02:06:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594395998] [2023-11-29 02:06:08,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:06:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:06:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:06:08,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 72 [2023-11-29 02:06:08,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 285 transitions, 3929 flow. Second operand has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:08,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:06:08,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 72 [2023-11-29 02:06:08,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:06:24,599 INFO L124 PetriNetUnfolderBase]: 44426/82519 cut-off events. [2023-11-29 02:06:24,599 INFO L125 PetriNetUnfolderBase]: For 321808/324909 co-relation queries the response was YES. [2023-11-29 02:06:25,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295555 conditions, 82519 events. 44426/82519 cut-off events. For 321808/324909 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 776966 event pairs, 12613 based on Foata normal form. 2364/84571 useless extension candidates. Maximal degree in co-relation 295479. Up to 22727 conditions per place. [2023-11-29 02:06:25,846 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 493 selfloop transitions, 34 changer transitions 53/602 dead transitions. [2023-11-29 02:06:25,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 602 transitions, 7991 flow [2023-11-29 02:06:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:06:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:06:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 521 transitions. [2023-11-29 02:06:25,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020061728395062 [2023-11-29 02:06:25,848 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 521 transitions. [2023-11-29 02:06:25,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 521 transitions. [2023-11-29 02:06:25,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:06:25,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 521 transitions. [2023-11-29 02:06:25,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 28.944444444444443) internal successors, (521), 18 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:25,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:25,852 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:25,852 INFO L175 Difference]: Start difference. First operand has 244 places, 285 transitions, 3929 flow. Second operand 18 states and 521 transitions. [2023-11-29 02:06:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 602 transitions, 7991 flow [2023-11-29 02:06:28,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 602 transitions, 7676 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-29 02:06:28,411 INFO L231 Difference]: Finished difference. Result has 256 places, 287 transitions, 3654 flow [2023-11-29 02:06:28,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3654, PETRI_PLACES=256, PETRI_TRANSITIONS=287} [2023-11-29 02:06:28,412 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 186 predicate places. [2023-11-29 02:06:28,412 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 287 transitions, 3654 flow [2023-11-29 02:06:28,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:28,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:06:28,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:28,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:06:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 02:06:28,613 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-29 02:06:28,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1168492754, now seen corresponding path program 2 times [2023-11-29 02:06:28,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:28,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912857349] [2023-11-29 02:06:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:28,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:30,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912857349] [2023-11-29 02:06:30,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912857349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627249513] [2023-11-29 02:06:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:06:30,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:30,169 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:30,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4b75f6-c29f-4842-b643-f3dda14dbaaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:06:30,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:06:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:30,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:06:30,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:30,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:30,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2023-11-29 02:06:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:06:30,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:06:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627249513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:06:30,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:06:30,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 21 [2023-11-29 02:06:30,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331382383] [2023-11-29 02:06:30,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:06:30,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:06:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:06:30,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:06:30,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-29 02:06:30,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 287 transitions, 3654 flow. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:30,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:06:30,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-29 02:06:30,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand