./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/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_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/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_1a5a3a42-9a07-4943-9e5b-75be8b77b084/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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:08:17,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:08:17,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 00:08:17,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:08:17,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:08:17,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:08:17,647 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:08:17,648 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:08:17,648 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:08:17,649 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:08:17,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:08:17,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:08:17,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:08:17,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:08:17,652 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:08:17,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:08:17,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:08:17,654 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:08:17,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:08:17,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:08:17,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:08:17,656 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:08:17,656 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:08:17,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:08:17,657 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 00:08:17,658 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:08:17,658 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:08:17,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:08:17,659 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:08:17,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:08:17,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:08:17,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:08:17,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:08:17,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:08:17,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:08:17,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:08:17,662 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:08:17,663 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:08:17,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:08:17,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:08:17,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:08:17,665 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:08:17,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:08:17,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:08:17,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-29 00:08:17,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:08:17,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:08:17,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:08:17,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:08:17,925 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:08:17,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 00:08:20,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:08:20,943 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:08:20,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 00:08:20,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/data/0bc7a4274/ad08be8649b34cca8eade978f82599b6/FLAG045723fea [2023-11-29 00:08:20,964 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/data/0bc7a4274/ad08be8649b34cca8eade978f82599b6 [2023-11-29 00:08:20,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:08:20,968 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:08:20,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:08:20,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:08:20,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:08:20,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:08:20" (1/1) ... [2023-11-29 00:08:20,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d10702c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:20, skipping insertion in model container [2023-11-29 00:08:20,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:08:20" (1/1) ... [2023-11-29 00:08:20,999 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:08:21,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:08:21,178 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:08:21,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:08:21,209 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:08:21,210 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:08:21,218 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:08:21,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21 WrapperNode [2023-11-29 00:08:21,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:08:21,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:08:21,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:08:21,220 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:08:21,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,254 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-29 00:08:21,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:08:21,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:08:21,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:08:21,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:08:21,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,269 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,284 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 00:08:21,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:08:21,301 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:08:21,301 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:08:21,301 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:08:21,302 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (1/1) ... [2023-11-29 00:08:21,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:08:21,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:21,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:08:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:08:21,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:08:21,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:08:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:08:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:08:21,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:08:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:08:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:08:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:08:21,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:08:21,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:08:21,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:08:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:08:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:08:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:08:21,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:08:21,378 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 00:08:21,485 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:08:21,487 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:08:21,679 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:08:21,836 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:08:21,836 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:08:21,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:08:21 BoogieIcfgContainer [2023-11-29 00:08:21,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:08:21,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:08:21,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:08:21,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:08:21,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:08:20" (1/3) ... [2023-11-29 00:08:21,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fc44bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:08:21, skipping insertion in model container [2023-11-29 00:08:21,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:08:21" (2/3) ... [2023-11-29 00:08:21,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fc44bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:08:21, skipping insertion in model container [2023-11-29 00:08:21,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:08:21" (3/3) ... [2023-11-29 00:08:21,847 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-29 00:08:21,856 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:08:21,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:08:21,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-29 00:08:21,869 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:08:21,914 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:08:21,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 30 transitions, 74 flow [2023-11-29 00:08:21,983 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2023-11-29 00:08:21,984 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:08:21,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 65 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-29 00:08:21,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 30 transitions, 74 flow [2023-11-29 00:08:21,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 61 flow [2023-11-29 00:08:22,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:08:22,020 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;@265fcc63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:08:22,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-29 00:08:22,026 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:08:22,027 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-29 00:08:22,027 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:08:22,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:22,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:08:22,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:22,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash 275620399, now seen corresponding path program 1 times [2023-11-29 00:08:22,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:22,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549838933] [2023-11-29 00:08:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:22,321 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 00:08:22,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:22,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549838933] [2023-11-29 00:08:22,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549838933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:22,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:22,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:08:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376616335] [2023-11-29 00:08:22,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:22,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:08:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:08:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:08:22,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:22,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:22,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:22,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:22,532 INFO L124 PetriNetUnfolderBase]: 152/312 cut-off events. [2023-11-29 00:08:22,532 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 00:08:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 312 events. 152/312 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1315 event pairs, 54 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 517. Up to 203 conditions per place. [2023-11-29 00:08:22,538 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 24 selfloop transitions, 2 changer transitions 3/35 dead transitions. [2023-11-29 00:08:22,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 143 flow [2023-11-29 00:08:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:08:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:08:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 00:08:22,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 00:08:22,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 00:08:22,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 00:08:22,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:22,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 00:08:22,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,569 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 61 flow. Second operand 3 states and 60 transitions. [2023-11-29 00:08:22,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 143 flow [2023-11-29 00:08:22,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:08:22,576 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2023-11-29 00:08:22,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-29 00:08:22,582 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-29 00:08:22,582 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2023-11-29 00:08:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:22,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:22,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:08:22,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:22,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1416758350, now seen corresponding path program 1 times [2023-11-29 00:08:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:22,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300287473] [2023-11-29 00:08:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:22,678 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 00:08:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300287473] [2023-11-29 00:08:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300287473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:22,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:22,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:08:22,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294289089] [2023-11-29 00:08:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:22,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:08:22,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:08:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:08:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-29 00:08:22,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-29 00:08:22,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:22,880 INFO L124 PetriNetUnfolderBase]: 252/490 cut-off events. [2023-11-29 00:08:22,880 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-29 00:08:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 490 events. 252/490 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2328 event pairs, 115 based on Foata normal form. 14/417 useless extension candidates. Maximal degree in co-relation 556. Up to 355 conditions per place. [2023-11-29 00:08:22,887 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 40 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-11-29 00:08:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 220 flow [2023-11-29 00:08:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:08:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:08:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2023-11-29 00:08:22,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-29 00:08:22,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 66 transitions. [2023-11-29 00:08:22,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 66 transitions. [2023-11-29 00:08:22,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:22,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 66 transitions. [2023-11-29 00:08:22,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,892 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,893 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 66 transitions. [2023-11-29 00:08:22,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 220 flow [2023-11-29 00:08:22,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:08:22,896 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 96 flow [2023-11-29 00:08:22,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-29 00:08:22,897 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-29 00:08:22,897 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 96 flow [2023-11-29 00:08:22,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:22,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:08:22,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:22,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1247292188, now seen corresponding path program 1 times [2023-11-29 00:08:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678690633] [2023-11-29 00:08:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:22,961 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 00:08:22,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678690633] [2023-11-29 00:08:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678690633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:22,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:22,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:08:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087455942] [2023-11-29 00:08:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:08:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:08:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:08:22,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:22,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:22,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:22,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:22,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:23,034 INFO L124 PetriNetUnfolderBase]: 135/264 cut-off events. [2023-11-29 00:08:23,034 INFO L125 PetriNetUnfolderBase]: For 88/107 co-relation queries the response was YES. [2023-11-29 00:08:23,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 264 events. 135/264 cut-off events. For 88/107 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1130 event pairs, 105 based on Foata normal form. 7/225 useless extension candidates. Maximal degree in co-relation 415. Up to 234 conditions per place. [2023-11-29 00:08:23,038 INFO L140 encePairwiseOnDemand]: 28/30 looper letters, 19 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 00:08:23,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 132 flow [2023-11-29 00:08:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:08:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:08:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2023-11-29 00:08:23,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-29 00:08:23,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2023-11-29 00:08:23,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2023-11-29 00:08:23,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:23,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2023-11-29 00:08:23,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,043 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 96 flow. Second operand 3 states and 43 transitions. [2023-11-29 00:08:23,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 132 flow [2023-11-29 00:08:23,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:08:23,045 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 92 flow [2023-11-29 00:08:23,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-29 00:08:23,047 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-29 00:08:23,047 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 92 flow [2023-11-29 00:08:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:23,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:23,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:08:23,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:23,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:23,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1378962137, now seen corresponding path program 1 times [2023-11-29 00:08:23,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:23,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087051434] [2023-11-29 00:08:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:23,109 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 00:08:23,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087051434] [2023-11-29 00:08:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087051434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:23,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:23,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:08:23,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389291342] [2023-11-29 00:08:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:23,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:08:23,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:08:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:08:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:23,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:23,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:23,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:23,230 INFO L124 PetriNetUnfolderBase]: 187/362 cut-off events. [2023-11-29 00:08:23,230 INFO L125 PetriNetUnfolderBase]: For 113/150 co-relation queries the response was YES. [2023-11-29 00:08:23,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 362 events. 187/362 cut-off events. For 113/150 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1673 event pairs, 105 based on Foata normal form. 27/337 useless extension candidates. Maximal degree in co-relation 852. Up to 235 conditions per place. [2023-11-29 00:08:23,234 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-29 00:08:23,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 201 flow [2023-11-29 00:08:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:08:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:08:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 00:08:23,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-11-29 00:08:23,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 00:08:23,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 00:08:23,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:23,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 00:08:23,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,244 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 92 flow. Second operand 3 states and 55 transitions. [2023-11-29 00:08:23,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 201 flow [2023-11-29 00:08:23,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:08:23,248 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 105 flow [2023-11-29 00:08:23,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-29 00:08:23,250 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-29 00:08:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 105 flow [2023-11-29 00:08:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:23,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:08:23,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -4085471, now seen corresponding path program 1 times [2023-11-29 00:08:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712229075] [2023-11-29 00:08:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:23,305 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 00:08:23,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:23,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712229075] [2023-11-29 00:08:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712229075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:23,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:08:23,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:08:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091862911] [2023-11-29 00:08:23,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:08:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:08:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:08:23,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:23,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:23,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:23,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:23,377 INFO L124 PetriNetUnfolderBase]: 164/303 cut-off events. [2023-11-29 00:08:23,377 INFO L125 PetriNetUnfolderBase]: For 189/226 co-relation queries the response was YES. [2023-11-29 00:08:23,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 303 events. 164/303 cut-off events. For 189/226 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1292 event pairs, 132 based on Foata normal form. 13/266 useless extension candidates. Maximal degree in co-relation 820. Up to 283 conditions per place. [2023-11-29 00:08:23,381 INFO L140 encePairwiseOnDemand]: 28/30 looper letters, 19 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 00:08:23,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 141 flow [2023-11-29 00:08:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:08:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:08:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-29 00:08:23,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-29 00:08:23,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-29 00:08:23,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-29 00:08:23,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:23,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-29 00:08:23,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,385 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 105 flow. Second operand 3 states and 42 transitions. [2023-11-29 00:08:23,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 141 flow [2023-11-29 00:08:23,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:08:23,388 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 101 flow [2023-11-29 00:08:23,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-11-29 00:08:23,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-29 00:08:23,389 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 101 flow [2023-11-29 00:08:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:23,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:23,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:08:23,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:23,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash -4085470, now seen corresponding path program 1 times [2023-11-29 00:08:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:23,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630855406] [2023-11-29 00:08:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:23,443 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 00:08:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:23,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630855406] [2023-11-29 00:08:23,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630855406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122394587] [2023-11-29 00:08:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:23,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:23,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:23,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:08:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:23,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:08:23,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:23,590 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 00:08:23,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:23,619 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 00:08:23,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122394587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:23,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-29 00:08:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120538539] [2023-11-29 00:08:23,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:23,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:08:23,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:08:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:08:23,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:23,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:23,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:23,886 INFO L124 PetriNetUnfolderBase]: 436/1072 cut-off events. [2023-11-29 00:08:23,886 INFO L125 PetriNetUnfolderBase]: For 439/449 co-relation queries the response was YES. [2023-11-29 00:08:23,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2594 conditions, 1072 events. 436/1072 cut-off events. For 439/449 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6189 event pairs, 39 based on Foata normal form. 18/1029 useless extension candidates. Maximal degree in co-relation 2582. Up to 201 conditions per place. [2023-11-29 00:08:23,896 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 66 selfloop transitions, 15 changer transitions 3/91 dead transitions. [2023-11-29 00:08:23,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 91 transitions, 494 flow [2023-11-29 00:08:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:08:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:08:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2023-11-29 00:08:23,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2023-11-29 00:08:23,898 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 138 transitions. [2023-11-29 00:08:23,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 138 transitions. [2023-11-29 00:08:23,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:23,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 138 transitions. [2023-11-29 00:08:23,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,901 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,902 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 101 flow. Second operand 7 states and 138 transitions. [2023-11-29 00:08:23,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 91 transitions, 494 flow [2023-11-29 00:08:23,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 91 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:08:23,907 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 250 flow [2023-11-29 00:08:23,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=250, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-29 00:08:23,908 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2023-11-29 00:08:23,909 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 250 flow [2023-11-29 00:08:23,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:23,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:23,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:23,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:08:24,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:08:24,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:24,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash -948875097, now seen corresponding path program 1 times [2023-11-29 00:08:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:24,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151560071] [2023-11-29 00:08:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:24,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:24,204 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 00:08:24,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:24,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151560071] [2023-11-29 00:08:24,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151560071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671853493] [2023-11-29 00:08:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:24,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:24,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:24,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:24,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:08:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:24,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:08:24,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:24,327 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 00:08:24,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:24,370 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 00:08:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671853493] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:24,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:24,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-11-29 00:08:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318510818] [2023-11-29 00:08:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:24,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:08:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:08:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:08:24,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:24,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:24,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:24,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:24,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:24,532 INFO L124 PetriNetUnfolderBase]: 384/828 cut-off events. [2023-11-29 00:08:24,532 INFO L125 PetriNetUnfolderBase]: For 1581/1642 co-relation queries the response was YES. [2023-11-29 00:08:24,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 828 events. 384/828 cut-off events. For 1581/1642 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4323 event pairs, 71 based on Foata normal form. 11/821 useless extension candidates. Maximal degree in co-relation 2491. Up to 559 conditions per place. [2023-11-29 00:08:24,540 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 43 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-29 00:08:24,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 398 flow [2023-11-29 00:08:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:08:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:08:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2023-11-29 00:08:24,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-11-29 00:08:24,542 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 61 transitions. [2023-11-29 00:08:24,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 61 transitions. [2023-11-29 00:08:24,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:24,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 61 transitions. [2023-11-29 00:08:24,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:24,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:24,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:24,544 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 250 flow. Second operand 4 states and 61 transitions. [2023-11-29 00:08:24,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 398 flow [2023-11-29 00:08:24,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 384 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-29 00:08:24,552 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 248 flow [2023-11-29 00:08:24,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-29 00:08:24,553 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2023-11-29 00:08:24,553 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 248 flow [2023-11-29 00:08:24,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:24,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:24,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:24,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:08:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:24,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1275770042, now seen corresponding path program 1 times [2023-11-29 00:08:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:24,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939418298] [2023-11-29 00:08:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:24,840 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 00:08:24,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939418298] [2023-11-29 00:08:24,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939418298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326174156] [2023-11-29 00:08:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:24,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:24,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:24,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:08:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:24,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:08:24,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:08:24,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:24,998 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 00:08:24,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326174156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:24,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:24,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-11-29 00:08:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407086238] [2023-11-29 00:08:24,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:25,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:08:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:08:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:08:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:08:25,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:25,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:08:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:25,297 INFO L124 PetriNetUnfolderBase]: 702/1498 cut-off events. [2023-11-29 00:08:25,297 INFO L125 PetriNetUnfolderBase]: For 2404/2462 co-relation queries the response was YES. [2023-11-29 00:08:25,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4168 conditions, 1498 events. 702/1498 cut-off events. For 2404/2462 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8691 event pairs, 95 based on Foata normal form. 66/1401 useless extension candidates. Maximal degree in co-relation 4148. Up to 466 conditions per place. [2023-11-29 00:08:25,308 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 46 selfloop transitions, 16 changer transitions 9/77 dead transitions. [2023-11-29 00:08:25,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 563 flow [2023-11-29 00:08:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:08:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:08:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2023-11-29 00:08:25,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 00:08:25,309 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 97 transitions. [2023-11-29 00:08:25,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 97 transitions. [2023-11-29 00:08:25,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:25,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 97 transitions. [2023-11-29 00:08:25,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,312 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,312 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 248 flow. Second operand 7 states and 97 transitions. [2023-11-29 00:08:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 563 flow [2023-11-29 00:08:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 541 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 00:08:25,320 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 300 flow [2023-11-29 00:08:25,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-11-29 00:08:25,321 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2023-11-29 00:08:25,321 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 300 flow [2023-11-29 00:08:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:25,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:25,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:08:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:08:25,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:25,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash 368840228, now seen corresponding path program 1 times [2023-11-29 00:08:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212621188] [2023-11-29 00:08:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212621188] [2023-11-29 00:08:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212621188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928208238] [2023-11-29 00:08:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:25,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:08:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:08:25,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:25,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:08:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928208238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:08:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:08:25,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:08:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312822330] [2023-11-29 00:08:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:08:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:08:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:08:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:08:25,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-29 00:08:25,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:25,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-29 00:08:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:25,917 INFO L124 PetriNetUnfolderBase]: 550/1137 cut-off events. [2023-11-29 00:08:25,917 INFO L125 PetriNetUnfolderBase]: For 2573/2599 co-relation queries the response was YES. [2023-11-29 00:08:25,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3584 conditions, 1137 events. 550/1137 cut-off events. For 2573/2599 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5642 event pairs, 44 based on Foata normal form. 72/1137 useless extension candidates. Maximal degree in co-relation 3562. Up to 451 conditions per place. [2023-11-29 00:08:25,929 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 66 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-29 00:08:25,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 691 flow [2023-11-29 00:08:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:08:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:08:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2023-11-29 00:08:25,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 00:08:25,931 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 72 transitions. [2023-11-29 00:08:25,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 72 transitions. [2023-11-29 00:08:25,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:25,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 72 transitions. [2023-11-29 00:08:25,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,932 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,933 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 300 flow. Second operand 6 states and 72 transitions. [2023-11-29 00:08:25,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 691 flow [2023-11-29 00:08:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 671 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 00:08:25,939 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 296 flow [2023-11-29 00:08:25,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-11-29 00:08:25,940 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2023-11-29 00:08:25,940 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 296 flow [2023-11-29 00:08:25,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:25,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:25,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 00:08:25,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:08:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:26,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:26,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1450854516, now seen corresponding path program 1 times [2023-11-29 00:08:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:26,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212553437] [2023-11-29 00:08:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:26,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:26,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:26,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212553437] [2023-11-29 00:08:26,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212553437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:26,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090960835] [2023-11-29 00:08:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:26,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:26,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:08:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:26,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:08:26,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:26,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090960835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:26,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 00:08:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169656180] [2023-11-29 00:08:26,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:26,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:08:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:26,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:08:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:08:26,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-29 00:08:26,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:26,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:26,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-29 00:08:26,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:26,709 INFO L124 PetriNetUnfolderBase]: 744/1574 cut-off events. [2023-11-29 00:08:26,709 INFO L125 PetriNetUnfolderBase]: For 3659/3703 co-relation queries the response was YES. [2023-11-29 00:08:26,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 1574 events. 744/1574 cut-off events. For 3659/3703 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8419 event pairs, 152 based on Foata normal form. 108/1680 useless extension candidates. Maximal degree in co-relation 4969. Up to 466 conditions per place. [2023-11-29 00:08:26,725 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 121 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2023-11-29 00:08:26,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 134 transitions, 1218 flow [2023-11-29 00:08:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:08:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:08:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2023-11-29 00:08:26,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-11-29 00:08:26,727 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 127 transitions. [2023-11-29 00:08:26,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 127 transitions. [2023-11-29 00:08:26,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:26,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 127 transitions. [2023-11-29 00:08:26,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:26,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:26,729 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:26,729 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 296 flow. Second operand 10 states and 127 transitions. [2023-11-29 00:08:26,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 134 transitions, 1218 flow [2023-11-29 00:08:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 134 transitions, 1203 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-29 00:08:26,738 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 351 flow [2023-11-29 00:08:26,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=351, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-11-29 00:08:26,738 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2023-11-29 00:08:26,739 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 351 flow [2023-11-29 00:08:26,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:26,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:26,739 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 00:08:26,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:08:26,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:08:26,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:26,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash -152133456, now seen corresponding path program 2 times [2023-11-29 00:08:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:26,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857054891] [2023-11-29 00:08:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:27,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857054891] [2023-11-29 00:08:27,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857054891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825995444] [2023-11-29 00:08:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:08:27,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:27,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:27,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:08:27,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:08:27,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:27,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:08:27,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:27,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825995444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:27,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:27,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 00:08:27,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280037385] [2023-11-29 00:08:27,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:08:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:08:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:08:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:27,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 351 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:27,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:27,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:27,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:27,749 INFO L124 PetriNetUnfolderBase]: 949/2523 cut-off events. [2023-11-29 00:08:27,750 INFO L125 PetriNetUnfolderBase]: For 9488/9584 co-relation queries the response was YES. [2023-11-29 00:08:27,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8455 conditions, 2523 events. 949/2523 cut-off events. For 9488/9584 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 16150 event pairs, 45 based on Foata normal form. 140/2642 useless extension candidates. Maximal degree in co-relation 8432. Up to 477 conditions per place. [2023-11-29 00:08:27,775 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 98 selfloop transitions, 49 changer transitions 0/157 dead transitions. [2023-11-29 00:08:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 157 transitions, 1380 flow [2023-11-29 00:08:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:08:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:08:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2023-11-29 00:08:27,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-11-29 00:08:27,777 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 210 transitions. [2023-11-29 00:08:27,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 210 transitions. [2023-11-29 00:08:27,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 210 transitions. [2023-11-29 00:08:27,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 13 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:27,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:27,780 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:27,780 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 351 flow. Second operand 13 states and 210 transitions. [2023-11-29 00:08:27,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 157 transitions, 1380 flow [2023-11-29 00:08:27,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 157 transitions, 1351 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 00:08:27,795 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 924 flow [2023-11-29 00:08:27,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=924, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2023-11-29 00:08:27,796 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2023-11-29 00:08:27,796 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 924 flow [2023-11-29 00:08:27,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:27,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:27,797 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-11-29 00:08:27,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:08:27,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:08:27,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:27,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1016992450, now seen corresponding path program 2 times [2023-11-29 00:08:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:27,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291808618] [2023-11-29 00:08:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:27,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:28,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291808618] [2023-11-29 00:08:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291808618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:28,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952155198] [2023-11-29 00:08:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:08:28,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:28,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:28,151 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:28,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:08:28,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:08:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:28,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:08:28,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 00:08:28,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 00:08:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952155198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:28,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-29 00:08:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927419758] [2023-11-29 00:08:28,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:08:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:08:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:08:28,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:08:28,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 924 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:28,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:08:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:29,347 INFO L124 PetriNetUnfolderBase]: 2236/4267 cut-off events. [2023-11-29 00:08:29,347 INFO L125 PetriNetUnfolderBase]: For 19770/19882 co-relation queries the response was YES. [2023-11-29 00:08:29,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15621 conditions, 4267 events. 2236/4267 cut-off events. For 19770/19882 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 23652 event pairs, 123 based on Foata normal form. 236/4503 useless extension candidates. Maximal degree in co-relation 15586. Up to 1114 conditions per place. [2023-11-29 00:08:29,381 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 292 selfloop transitions, 15 changer transitions 0/310 dead transitions. [2023-11-29 00:08:29,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 310 transitions, 3799 flow [2023-11-29 00:08:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:08:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:08:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 169 transitions. [2023-11-29 00:08:29,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37555555555555553 [2023-11-29 00:08:29,383 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 169 transitions. [2023-11-29 00:08:29,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 169 transitions. [2023-11-29 00:08:29,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:29,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 169 transitions. [2023-11-29 00:08:29,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:29,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:29,385 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:29,385 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 924 flow. Second operand 15 states and 169 transitions. [2023-11-29 00:08:29,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 310 transitions, 3799 flow [2023-11-29 00:08:29,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 310 transitions, 3386 flow, removed 190 selfloop flow, removed 6 redundant places. [2023-11-29 00:08:29,430 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 827 flow [2023-11-29 00:08:29,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=827, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-11-29 00:08:29,431 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2023-11-29 00:08:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 827 flow [2023-11-29 00:08:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:29,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:29,432 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-29 00:08:29,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:08:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:08:29,638 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:29,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1925162608, now seen corresponding path program 3 times [2023-11-29 00:08:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182171770] [2023-11-29 00:08:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182171770] [2023-11-29 00:08:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182171770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:29,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82945700] [2023-11-29 00:08:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:08:29,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:29,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:29,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:08:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:08:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:29,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:08:29,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:30,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82945700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:30,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:30,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-29 00:08:30,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146791710] [2023-11-29 00:08:30,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:08:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:08:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:08:30,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:30,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 827 flow. Second operand has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:30,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:30,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:30,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:31,640 INFO L124 PetriNetUnfolderBase]: 2331/5987 cut-off events. [2023-11-29 00:08:31,640 INFO L125 PetriNetUnfolderBase]: For 51973/52199 co-relation queries the response was YES. [2023-11-29 00:08:31,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21177 conditions, 5987 events. 2331/5987 cut-off events. For 51973/52199 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 39185 event pairs, 55 based on Foata normal form. 284/6242 useless extension candidates. Maximal degree in co-relation 21145. Up to 1229 conditions per place. [2023-11-29 00:08:31,682 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 178 selfloop transitions, 165 changer transitions 0/354 dead transitions. [2023-11-29 00:08:31,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 354 transitions, 3375 flow [2023-11-29 00:08:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:08:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 00:08:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 414 transitions. [2023-11-29 00:08:31,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552 [2023-11-29 00:08:31,685 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 414 transitions. [2023-11-29 00:08:31,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 414 transitions. [2023-11-29 00:08:31,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:31,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 414 transitions. [2023-11-29 00:08:31,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 16.56) internal successors, (414), 25 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:31,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 30.0) internal successors, (780), 26 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:31,689 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 30.0) internal successors, (780), 26 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:31,689 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 827 flow. Second operand 25 states and 414 transitions. [2023-11-29 00:08:31,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 354 transitions, 3375 flow [2023-11-29 00:08:31,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 354 transitions, 3180 flow, removed 31 selfloop flow, removed 12 redundant places. [2023-11-29 00:08:31,740 INFO L231 Difference]: Finished difference. Result has 124 places, 206 transitions, 2566 flow [2023-11-29 00:08:31,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2566, PETRI_PLACES=124, PETRI_TRANSITIONS=206} [2023-11-29 00:08:31,742 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 93 predicate places. [2023-11-29 00:08:31,742 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 206 transitions, 2566 flow [2023-11-29 00:08:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:31,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:31,743 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-29 00:08:31,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 00:08:31,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:08:31,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:31,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1912864272, now seen corresponding path program 4 times [2023-11-29 00:08:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:31,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26007621] [2023-11-29 00:08:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:32,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:32,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26007621] [2023-11-29 00:08:32,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26007621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344511874] [2023-11-29 00:08:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:08:32,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:32,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:08:32,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:08:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:32,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:08:32,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:32,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:33,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344511874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:33,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:33,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-29 00:08:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408701528] [2023-11-29 00:08:33,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 00:08:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:33,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 00:08:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 00:08:33,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:33,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 206 transitions, 2566 flow. Second operand has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:33,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:33,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:33,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:37,476 INFO L124 PetriNetUnfolderBase]: 5441/14405 cut-off events. [2023-11-29 00:08:37,476 INFO L125 PetriNetUnfolderBase]: For 422270/422526 co-relation queries the response was YES. [2023-11-29 00:08:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48983 conditions, 14405 events. 5441/14405 cut-off events. For 422270/422526 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 98646 event pairs, 81 based on Foata normal form. 570/14936 useless extension candidates. Maximal degree in co-relation 48929. Up to 2515 conditions per place. [2023-11-29 00:08:37,572 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 324 selfloop transitions, 545 changer transitions 0/880 dead transitions. [2023-11-29 00:08:37,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 880 transitions, 10323 flow [2023-11-29 00:08:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:08:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 00:08:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 822 transitions. [2023-11-29 00:08:37,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5591836734693878 [2023-11-29 00:08:37,576 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 822 transitions. [2023-11-29 00:08:37,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 822 transitions. [2023-11-29 00:08:37,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:37,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 822 transitions. [2023-11-29 00:08:37,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 16.775510204081634) internal successors, (822), 49 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,581 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,581 INFO L175 Difference]: Start difference. First operand has 124 places, 206 transitions, 2566 flow. Second operand 49 states and 822 transitions. [2023-11-29 00:08:37,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 880 transitions, 10323 flow [2023-11-29 00:08:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 880 transitions, 8445 flow, removed 911 selfloop flow, removed 5 redundant places. [2023-11-29 00:08:37,810 INFO L231 Difference]: Finished difference. Result has 213 places, 588 transitions, 7699 flow [2023-11-29 00:08:37,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7699, PETRI_PLACES=213, PETRI_TRANSITIONS=588} [2023-11-29 00:08:37,811 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2023-11-29 00:08:37,811 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 588 transitions, 7699 flow [2023-11-29 00:08:37,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:37,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:08:37,811 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-29 00:08:37,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 00:08:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:08:38,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:08:38,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 99481840, now seen corresponding path program 5 times [2023-11-29 00:08:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732348189] [2023-11-29 00:08:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:40,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732348189] [2023-11-29 00:08:40,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732348189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202937343] [2023-11-29 00:08:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:08:40,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:40,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:40,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:08:40,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-29 00:08:40,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:40,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 00:08:40,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:40,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202937343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:43,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-29 00:08:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922308590] [2023-11-29 00:08:43,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 00:08:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 00:08:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 00:08:43,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:08:43,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 588 transitions, 7699 flow. Second operand has 97 states, 97 states have (on average 10.02061855670103) internal successors, (972), 97 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:08:43,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:08:43,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:08:43,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:02,528 INFO L124 PetriNetUnfolderBase]: 15127/40487 cut-off events. [2023-11-29 00:09:02,528 INFO L125 PetriNetUnfolderBase]: For 3444634/3445176 co-relation queries the response was YES. [2023-11-29 00:09:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137838 conditions, 40487 events. 15127/40487 cut-off events. For 3444634/3445176 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 305990 event pairs, 151 based on Foata normal form. 1146/41586 useless extension candidates. Maximal degree in co-relation 137741. Up to 7287 conditions per place. [2023-11-29 00:09:03,077 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 614 selfloop transitions, 1885 changer transitions 0/2510 dead transitions. [2023-11-29 00:09:03,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 2510 transitions, 31952 flow [2023-11-29 00:09:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 00:09:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-29 00:09:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 1638 transitions. [2023-11-29 00:09:03,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628865979381443 [2023-11-29 00:09:03,083 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 1638 transitions. [2023-11-29 00:09:03,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 1638 transitions. [2023-11-29 00:09:03,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:03,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 1638 transitions. [2023-11-29 00:09:03,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 16.88659793814433) internal successors, (1638), 97 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:03,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 30.0) internal successors, (2940), 98 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:03,097 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 30.0) internal successors, (2940), 98 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:03,097 INFO L175 Difference]: Start difference. First operand has 213 places, 588 transitions, 7699 flow. Second operand 97 states and 1638 transitions. [2023-11-29 00:09:03,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 2510 transitions, 31952 flow [2023-11-29 00:09:04,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 2510 transitions, 25174 flow, removed 3269 selfloop flow, removed 11 redundant places. [2023-11-29 00:09:04,228 INFO L231 Difference]: Finished difference. Result has 392 places, 1930 transitions, 25328 flow [2023-11-29 00:09:04,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=25328, PETRI_PLACES=392, PETRI_TRANSITIONS=1930} [2023-11-29 00:09:04,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 361 predicate places. [2023-11-29 00:09:04,229 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1930 transitions, 25328 flow [2023-11-29 00:09:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 10.02061855670103) internal successors, (972), 97 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:04,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:04,230 INFO L208 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1] [2023-11-29 00:09:04,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:09:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:09:04,431 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:09:04,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash 204924656, now seen corresponding path program 6 times [2023-11-29 00:09:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:04,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326161612] [2023-11-29 00:09:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326161612] [2023-11-29 00:09:11,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326161612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89533446] [2023-11-29 00:09:11,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:09:11,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:11,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:09:12,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2023-11-29 00:09:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:09:12,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 00:09:12,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:12,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89533446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:21,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:21,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-11-29 00:09:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602755111] [2023-11-29 00:09:21,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-29 00:09:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-29 00:09:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 00:09:21,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:09:21,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1930 transitions, 25328 flow. Second operand has 193 states, 193 states have (on average 10.010362694300518) internal successors, (1932), 193 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:21,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:21,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:09:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:44,043 INFO L124 PetriNetUnfolderBase]: 48333/129545 cut-off events. [2023-11-29 00:11:44,043 INFO L125 PetriNetUnfolderBase]: For 28111222/28112338 co-relation queries the response was YES. [2023-11-29 00:11:47,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440053 conditions, 129545 events. 48333/129545 cut-off events. For 28111222/28112338 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 1111512 event pairs, 317 based on Foata normal form. 2298/131790 useless extension candidates. Maximal degree in co-relation 439871. Up to 23751 conditions per place. [2023-11-29 00:11:47,860 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 1192 selfloop transitions, 6873 changer transitions 0/8076 dead transitions. [2023-11-29 00:11:47,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 8076 transitions, 108785 flow [2023-11-29 00:11:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-29 00:11:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2023-11-29 00:11:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 3270 transitions. [2023-11-29 00:11:47,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647668393782384 [2023-11-29 00:11:47,872 INFO L72 ComplementDD]: Start complementDD. Operand 193 states and 3270 transitions. [2023-11-29 00:11:47,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 193 states and 3270 transitions. [2023-11-29 00:11:47,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:47,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 193 states and 3270 transitions. [2023-11-29 00:11:47,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 194 states, 193 states have (on average 16.94300518134715) internal successors, (3270), 193 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:47,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 194 states, 194 states have (on average 30.0) internal successors, (5820), 194 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:47,899 INFO L81 ComplementDD]: Finished complementDD. Result has 194 states, 194 states have (on average 30.0) internal successors, (5820), 194 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:47,899 INFO L175 Difference]: Start difference. First operand has 392 places, 1930 transitions, 25328 flow. Second operand 193 states and 3270 transitions. [2023-11-29 00:11:47,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 8076 transitions, 108785 flow [2023-11-29 00:11:57,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 8076 transitions, 83271 flow, removed 12305 selfloop flow, removed 23 redundant places. [2023-11-29 00:11:58,063 INFO L231 Difference]: Finished difference. Result has 751 places, 6920 transitions, 89845 flow [2023-11-29 00:11:58,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=23048, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=89845, PETRI_PLACES=751, PETRI_TRANSITIONS=6920} [2023-11-29 00:11:58,065 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 720 predicate places. [2023-11-29 00:11:58,065 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 6920 transitions, 89845 flow [2023-11-29 00:11:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 10.010362694300518) internal successors, (1932), 193 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:58,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:58,067 INFO L208 CegarLoopForPetriNet]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1, 1] [2023-11-29 00:11:58,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:11:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:11:58,267 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-29 00:11:58,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1985790704, now seen corresponding path program 7 times [2023-11-29 00:11:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129025959] [2023-11-29 00:11:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:23,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:23,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129025959] [2023-11-29 00:12:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129025959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:12:23,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844832048] [2023-11-29 00:12:23,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:12:23,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:12:23,689 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:12:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5a3a42-9a07-4943-9e5b-75be8b77b084/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:12:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:24,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-29 00:12:24,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:12:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:25,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844832048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:12:58,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:12:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-11-29 00:12:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101683851] [2023-11-29 00:12:58,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:12:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-11-29 00:12:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-11-29 00:12:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-11-29 00:12:58,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 00:12:58,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 6920 transitions, 89845 flow. Second operand has 385 states, 385 states have (on average 10.005194805194805) internal successors, (3852), 385 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:58,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:58,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 00:12:58,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand