./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/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_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/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_d02e3a24-ac89-4057-bebd-801f3ebf5a33/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:00:16,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:00:16,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 02:00:16,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:00:16,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:00:16,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:00:16,279 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:00:16,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:00:16,280 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:00:16,281 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:00:16,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:00:16,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:00:16,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:00:16,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:00:16,284 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:00:16,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:00:16,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:00:16,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:00:16,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:00:16,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:00:16,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:00:16,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:00:16,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:00:16,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:00:16,288 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 02:00:16,288 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:00:16,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:00:16,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:00:16,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:00:16,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:00:16,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:00:16,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:00:16,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:00:16,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:00:16,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:00:16,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:00:16,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:00:16,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:00:16,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:00:16,292 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:00:16,292 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:00:16,293 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:00:16,293 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:00:16,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:00:16,293 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_d02e3a24-ac89-4057-bebd-801f3ebf5a33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-29 02:00:16,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:00:16,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:00:16,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:00:16,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:00:16,567 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:00:16,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-29 02:00:19,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:00:19,511 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:00:19,512 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-29 02:00:19,530 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/data/42786e8b0/d7fa493b0fd64bf9b0f8a4053d34f4cd/FLAG3de000906 [2023-11-29 02:00:19,544 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/data/42786e8b0/d7fa493b0fd64bf9b0f8a4053d34f4cd [2023-11-29 02:00:19,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:00:19,548 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:00:19,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:00:19,550 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:00:19,555 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:00:19,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:00:19" (1/1) ... [2023-11-29 02:00:19,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb220b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:19, skipping insertion in model container [2023-11-29 02:00:19,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:00:19" (1/1) ... [2023-11-29 02:00:19,608 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:00:19,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:00:19,995 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:00:20,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:00:20,104 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:00:20,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20 WrapperNode [2023-11-29 02:00:20,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:00:20,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:00:20,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:00:20,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:00:20,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,155 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 168 [2023-11-29 02:00:20,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:00:20,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:00:20,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:00:20,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:00:20,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,170 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,182 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 3, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 2, 1, 1]. [2023-11-29 02:00:20,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:00:20,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:00:20,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:00:20,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:00:20,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (1/1) ... [2023-11-29 02:00:20,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:00:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:20,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:00:20,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:00:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 02:00:20,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 02:00:20,268 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:00:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:00:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:00:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:00:20,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:00:20,272 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:00:20,427 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:00:20,429 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:00:20,700 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:00:20,875 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:00:20,875 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:00:20,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:00:20 BoogieIcfgContainer [2023-11-29 02:00:20,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:00:20,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:00:20,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:00:20,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:00:20,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:00:19" (1/3) ... [2023-11-29 02:00:20,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796609d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:00:20, skipping insertion in model container [2023-11-29 02:00:20,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:00:20" (2/3) ... [2023-11-29 02:00:20,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796609d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:00:20, skipping insertion in model container [2023-11-29 02:00:20,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:00:20" (3/3) ... [2023-11-29 02:00:20,884 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-29 02:00:20,892 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:00:20,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:00:20,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-29 02:00:20,900 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:00:20,956 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:00:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2023-11-29 02:00:21,014 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-11-29 02:00:21,014 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:00:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-29 02:00:21,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2023-11-29 02:00:21,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 99 flow [2023-11-29 02:00:21,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:00:21,038 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;@2fc3caf4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:00:21,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-29 02:00:21,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:00:21,047 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-11-29 02:00:21,047 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:00:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:21,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:21,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:21,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -363768998, now seen corresponding path program 1 times [2023-11-29 02:00:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:21,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304444900] [2023-11-29 02:00:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:21,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304444900] [2023-11-29 02:00:21,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304444900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:21,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:21,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:00:21,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808582880] [2023-11-29 02:00:21,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:21,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:21,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 02:00:21,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:00:21,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:21,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 02:00:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:21,797 INFO L124 PetriNetUnfolderBase]: 750/1483 cut-off events. [2023-11-29 02:00:21,798 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-29 02:00:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2755 conditions, 1483 events. 750/1483 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7891 event pairs, 234 based on Foata normal form. 41/1373 useless extension candidates. Maximal degree in co-relation 2569. Up to 713 conditions per place. [2023-11-29 02:00:21,816 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 60 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-29 02:00:21,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 79 transitions, 306 flow [2023-11-29 02:00:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-29 02:00:21,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-29 02:00:21,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-29 02:00:21,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-29 02:00:21,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:21,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-29 02:00:21,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:21,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:21,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:21,841 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 4 states and 134 transitions. [2023-11-29 02:00:21,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 79 transitions, 306 flow [2023-11-29 02:00:21,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 79 transitions, 297 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:21,849 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 130 flow [2023-11-29 02:00:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-29 02:00:21,855 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-29 02:00:21,855 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 130 flow [2023-11-29 02:00:21,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:00:21,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:21,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:00:21,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:21,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1255862108, now seen corresponding path program 1 times [2023-11-29 02:00:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:21,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363243000] [2023-11-29 02:00:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:21,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:21,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363243000] [2023-11-29 02:00:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363243000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:21,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757974075] [2023-11-29 02:00:21,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:21,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:21,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:21,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 02:00:21,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:21,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:21,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 02:00:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:22,357 INFO L124 PetriNetUnfolderBase]: 1218/2479 cut-off events. [2023-11-29 02:00:22,357 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2023-11-29 02:00:22,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 2479 events. 1218/2479 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14555 event pairs, 633 based on Foata normal form. 78/2389 useless extension candidates. Maximal degree in co-relation 4279. Up to 1345 conditions per place. [2023-11-29 02:00:22,378 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 74 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-11-29 02:00:22,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 411 flow [2023-11-29 02:00:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-29 02:00:22,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2023-11-29 02:00:22,380 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-29 02:00:22,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-29 02:00:22,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:22,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-29 02:00:22,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:22,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:22,384 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:22,384 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 130 flow. Second operand 4 states and 135 transitions. [2023-11-29 02:00:22,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 411 flow [2023-11-29 02:00:22,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 411 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:00:22,388 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 154 flow [2023-11-29 02:00:22,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-29 02:00:22,389 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-11-29 02:00:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 154 flow [2023-11-29 02:00:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:22,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:22,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:00:22,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:22,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash 933507215, now seen corresponding path program 1 times [2023-11-29 02:00:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029993960] [2023-11-29 02:00:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:22,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:22,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029993960] [2023-11-29 02:00:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029993960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:22,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209710180] [2023-11-29 02:00:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:22,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:22,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 02:00:22,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:22,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:22,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 02:00:22,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:22,993 INFO L124 PetriNetUnfolderBase]: 1738/3382 cut-off events. [2023-11-29 02:00:22,993 INFO L125 PetriNetUnfolderBase]: For 1026/1068 co-relation queries the response was YES. [2023-11-29 02:00:22,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7505 conditions, 3382 events. 1738/3382 cut-off events. For 1026/1068 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 21633 event pairs, 849 based on Foata normal form. 82/3336 useless extension candidates. Maximal degree in co-relation 5351. Up to 2002 conditions per place. [2023-11-29 02:00:23,050 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 73 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-11-29 02:00:23,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 443 flow [2023-11-29 02:00:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-29 02:00:23,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-29 02:00:23,053 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-29 02:00:23,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-29 02:00:23,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:23,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-29 02:00:23,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,056 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,056 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 154 flow. Second operand 4 states and 134 transitions. [2023-11-29 02:00:23,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 443 flow [2023-11-29 02:00:23,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:23,061 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 176 flow [2023-11-29 02:00:23,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-29 02:00:23,062 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 11 predicate places. [2023-11-29 02:00:23,062 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 176 flow [2023-11-29 02:00:23,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:23,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:00:23,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:23,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1065117114, now seen corresponding path program 1 times [2023-11-29 02:00:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:23,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972343084] [2023-11-29 02:00:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:23,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972343084] [2023-11-29 02:00:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972343084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:23,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:23,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003143378] [2023-11-29 02:00:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:23,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:00:23,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:00:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:00:23,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-29 02:00:23,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:23,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-29 02:00:23,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:23,441 INFO L124 PetriNetUnfolderBase]: 929/2071 cut-off events. [2023-11-29 02:00:23,442 INFO L125 PetriNetUnfolderBase]: For 1002/1098 co-relation queries the response was YES. [2023-11-29 02:00:23,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4891 conditions, 2071 events. 929/2071 cut-off events. For 1002/1098 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12551 event pairs, 299 based on Foata normal form. 76/2097 useless extension candidates. Maximal degree in co-relation 3837. Up to 974 conditions per place. [2023-11-29 02:00:23,454 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 48 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-29 02:00:23,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 342 flow [2023-11-29 02:00:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:00:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:00:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-29 02:00:23,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 02:00:23,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-29 02:00:23,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-29 02:00:23,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:23,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-29 02:00:23,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,458 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 176 flow. Second operand 3 states and 98 transitions. [2023-11-29 02:00:23,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 342 flow [2023-11-29 02:00:23,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 336 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:23,464 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 175 flow [2023-11-29 02:00:23,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-11-29 02:00:23,465 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-11-29 02:00:23,466 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 175 flow [2023-11-29 02:00:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:23,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:23,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:00:23,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:23,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash 28680515, now seen corresponding path program 1 times [2023-11-29 02:00:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462778319] [2023-11-29 02:00:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:23,590 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 02:00:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:23,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462778319] [2023-11-29 02:00:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462778319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136433770] [2023-11-29 02:00:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:23,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:23,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:23,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:23,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:00:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:23,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:00:23,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:23,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:23,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136433770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:23,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:23,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 02:00:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569308816] [2023-11-29 02:00:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:23,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:00:23,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:23,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:23,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:23,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:23,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:24,239 INFO L124 PetriNetUnfolderBase]: 957/2066 cut-off events. [2023-11-29 02:00:24,239 INFO L125 PetriNetUnfolderBase]: For 1045/1153 co-relation queries the response was YES. [2023-11-29 02:00:24,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5108 conditions, 2066 events. 957/2066 cut-off events. For 1045/1153 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11876 event pairs, 195 based on Foata normal form. 74/2083 useless extension candidates. Maximal degree in co-relation 2769. Up to 762 conditions per place. [2023-11-29 02:00:24,256 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2023-11-29 02:00:24,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 111 transitions, 595 flow [2023-11-29 02:00:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:00:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:00:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2023-11-29 02:00:24,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2023-11-29 02:00:24,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 190 transitions. [2023-11-29 02:00:24,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 190 transitions. [2023-11-29 02:00:24,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:24,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 190 transitions. [2023-11-29 02:00:24,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,262 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,262 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 175 flow. Second operand 7 states and 190 transitions. [2023-11-29 02:00:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 111 transitions, 595 flow [2023-11-29 02:00:24,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 111 transitions, 585 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:24,267 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 231 flow [2023-11-29 02:00:24,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2023-11-29 02:00:24,268 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2023-11-29 02:00:24,268 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 231 flow [2023-11-29 02:00:24,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:24,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:24,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 02:00:24,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:24,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:24,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1316298551, now seen corresponding path program 1 times [2023-11-29 02:00:24,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:24,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823255289] [2023-11-29 02:00:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:24,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:24,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823255289] [2023-11-29 02:00:24,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823255289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:24,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132140180] [2023-11-29 02:00:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:24,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:24,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:24,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:24,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:24,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:24,948 INFO L124 PetriNetUnfolderBase]: 1211/2691 cut-off events. [2023-11-29 02:00:24,948 INFO L125 PetriNetUnfolderBase]: For 2148/2268 co-relation queries the response was YES. [2023-11-29 02:00:24,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 2691 events. 1211/2691 cut-off events. For 2148/2268 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17244 event pairs, 667 based on Foata normal form. 28/2712 useless extension candidates. Maximal degree in co-relation 5411. Up to 1405 conditions per place. [2023-11-29 02:00:24,970 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 66 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-29 02:00:24,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 506 flow [2023-11-29 02:00:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-29 02:00:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2023-11-29 02:00:24,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-29 02:00:24,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-29 02:00:24,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:24,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-29 02:00:24,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,974 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 231 flow. Second operand 4 states and 118 transitions. [2023-11-29 02:00:24,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 506 flow [2023-11-29 02:00:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 498 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:24,981 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 273 flow [2023-11-29 02:00:24,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-29 02:00:24,982 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-11-29 02:00:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 273 flow [2023-11-29 02:00:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:24,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:24,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:00:24,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:24,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 889096449, now seen corresponding path program 1 times [2023-11-29 02:00:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:24,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511604210] [2023-11-29 02:00:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:24,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:25,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511604210] [2023-11-29 02:00:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511604210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730350373] [2023-11-29 02:00:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:25,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:00:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:25,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:00:25,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:25,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730350373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:25,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:25,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 02:00:25,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61145675] [2023-11-29 02:00:25,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:25,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:00:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:00:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:00:25,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:25,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 273 flow. Second operand has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:25,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:25,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:26,588 INFO L124 PetriNetUnfolderBase]: 2649/5694 cut-off events. [2023-11-29 02:00:26,588 INFO L125 PetriNetUnfolderBase]: For 7475/7907 co-relation queries the response was YES. [2023-11-29 02:00:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15442 conditions, 5694 events. 2649/5694 cut-off events. For 7475/7907 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 37375 event pairs, 437 based on Foata normal form. 152/5839 useless extension candidates. Maximal degree in co-relation 8271. Up to 1223 conditions per place. [2023-11-29 02:00:26,621 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 196 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2023-11-29 02:00:26,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 241 transitions, 1538 flow [2023-11-29 02:00:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:00:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:00:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 431 transitions. [2023-11-29 02:00:26,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497448979591837 [2023-11-29 02:00:26,624 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 431 transitions. [2023-11-29 02:00:26,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 431 transitions. [2023-11-29 02:00:26,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:26,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 431 transitions. [2023-11-29 02:00:26,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 26.9375) internal successors, (431), 16 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:26,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:26,628 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:26,628 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 273 flow. Second operand 16 states and 431 transitions. [2023-11-29 02:00:26,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 241 transitions, 1538 flow [2023-11-29 02:00:26,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 241 transitions, 1526 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 02:00:26,638 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 600 flow [2023-11-29 02:00:26,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=600, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2023-11-29 02:00:26,639 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 41 predicate places. [2023-11-29 02:00:26,639 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 600 flow [2023-11-29 02:00:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:26,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:26,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:26,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:00:26,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:00:26,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:26,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1656537458, now seen corresponding path program 1 times [2023-11-29 02:00:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:26,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624766175] [2023-11-29 02:00:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:26,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:26,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624766175] [2023-11-29 02:00:26,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624766175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:26,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76228057] [2023-11-29 02:00:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:26,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:26,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:26,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:00:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:27,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:00:27,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:27,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76228057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:27,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 02:00:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256644324] [2023-11-29 02:00:27,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:27,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:00:27,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 02:00:27,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:27,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:27,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 02:00:27,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:28,012 INFO L124 PetriNetUnfolderBase]: 2830/6202 cut-off events. [2023-11-29 02:00:28,012 INFO L125 PetriNetUnfolderBase]: For 9886/10114 co-relation queries the response was YES. [2023-11-29 02:00:28,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17008 conditions, 6202 events. 2830/6202 cut-off events. For 9886/10114 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 42355 event pairs, 307 based on Foata normal form. 214/6201 useless extension candidates. Maximal degree in co-relation 14403. Up to 2177 conditions per place. [2023-11-29 02:00:28,042 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 199 selfloop transitions, 5 changer transitions 0/227 dead transitions. [2023-11-29 02:00:28,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 227 transitions, 2067 flow [2023-11-29 02:00:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:00:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:00:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-11-29 02:00:28,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2023-11-29 02:00:28,044 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-11-29 02:00:28,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-11-29 02:00:28,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:28,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-11-29 02:00:28,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:28,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:28,047 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:28,047 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 600 flow. Second operand 6 states and 190 transitions. [2023-11-29 02:00:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 227 transitions, 2067 flow [2023-11-29 02:00:28,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 227 transitions, 1975 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:28,070 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 566 flow [2023-11-29 02:00:28,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-11-29 02:00:28,072 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 42 predicate places. [2023-11-29 02:00:28,072 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 566 flow [2023-11-29 02:00:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:28,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:28,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:28,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:00:28,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:28,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:28,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 255743668, now seen corresponding path program 1 times [2023-11-29 02:00:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:28,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996508860] [2023-11-29 02:00:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996508860] [2023-11-29 02:00:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996508860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:00:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191457228] [2023-11-29 02:00:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:00:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 566 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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 02:00:28,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:28,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:29,234 INFO L124 PetriNetUnfolderBase]: 2921/6058 cut-off events. [2023-11-29 02:00:29,234 INFO L125 PetriNetUnfolderBase]: For 12148/12494 co-relation queries the response was YES. [2023-11-29 02:00:29,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18126 conditions, 6058 events. 2921/6058 cut-off events. For 12148/12494 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 39232 event pairs, 623 based on Foata normal form. 42/6095 useless extension candidates. Maximal degree in co-relation 15155. Up to 3577 conditions per place. [2023-11-29 02:00:29,268 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 122 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-11-29 02:00:29,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 145 transitions, 1127 flow [2023-11-29 02:00:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:00:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:00:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2023-11-29 02:00:29,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2023-11-29 02:00:29,269 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 166 transitions. [2023-11-29 02:00:29,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 166 transitions. [2023-11-29 02:00:29,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:29,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 166 transitions. [2023-11-29 02:00:29,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,272 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,272 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 566 flow. Second operand 6 states and 166 transitions. [2023-11-29 02:00:29,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 145 transitions, 1127 flow [2023-11-29 02:00:29,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 145 transitions, 1107 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:29,287 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 660 flow [2023-11-29 02:00:29,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-29 02:00:29,288 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-29 02:00:29,288 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 660 flow [2023-11-29 02:00:29,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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 02:00:29,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:29,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:29,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:00:29,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash -186945845, now seen corresponding path program 1 times [2023-11-29 02:00:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:29,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646283111] [2023-11-29 02:00:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646283111] [2023-11-29 02:00:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646283111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:29,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023244586] [2023-11-29 02:00:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:29,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:29,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 660 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:29,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:29,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:29,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:30,173 INFO L124 PetriNetUnfolderBase]: 3195/6759 cut-off events. [2023-11-29 02:00:30,174 INFO L125 PetriNetUnfolderBase]: For 12884/13022 co-relation queries the response was YES. [2023-11-29 02:00:30,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19607 conditions, 6759 events. 3195/6759 cut-off events. For 12884/13022 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 45444 event pairs, 595 based on Foata normal form. 226/6984 useless extension candidates. Maximal degree in co-relation 16644. Up to 2854 conditions per place. [2023-11-29 02:00:30,209 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 146 selfloop transitions, 6 changer transitions 0/175 dead transitions. [2023-11-29 02:00:30,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 175 transitions, 1632 flow [2023-11-29 02:00:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2023-11-29 02:00:30,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 02:00:30,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 119 transitions. [2023-11-29 02:00:30,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 119 transitions. [2023-11-29 02:00:30,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:30,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 119 transitions. [2023-11-29 02:00:30,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:30,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:30,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:30,212 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 660 flow. Second operand 4 states and 119 transitions. [2023-11-29 02:00:30,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 175 transitions, 1632 flow [2023-11-29 02:00:30,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 175 transitions, 1618 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:30,241 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 668 flow [2023-11-29 02:00:30,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-29 02:00:30,242 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-29 02:00:30,242 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 668 flow [2023-11-29 02:00:30,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:30,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:30,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:30,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:00:30,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:30,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 293678150, now seen corresponding path program 1 times [2023-11-29 02:00:30,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657764903] [2023-11-29 02:00:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657764903] [2023-11-29 02:00:30,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657764903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:30,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781051318] [2023-11-29 02:00:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:30,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:30,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:30,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:00:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:30,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:00:30,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:30,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781051318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:30,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 02:00:30,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682268468] [2023-11-29 02:00:30,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:30,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:30,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:00:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 02:00:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 668 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:30,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 02:00:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:31,585 INFO L124 PetriNetUnfolderBase]: 2914/6010 cut-off events. [2023-11-29 02:00:31,586 INFO L125 PetriNetUnfolderBase]: For 14228/14248 co-relation queries the response was YES. [2023-11-29 02:00:31,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 6010 events. 2914/6010 cut-off events. For 14228/14248 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 39114 event pairs, 237 based on Foata normal form. 178/6008 useless extension candidates. Maximal degree in co-relation 18047. Up to 3601 conditions per place. [2023-11-29 02:00:31,622 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 131 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2023-11-29 02:00:31,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 159 transitions, 1368 flow [2023-11-29 02:00:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:00:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:00:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2023-11-29 02:00:31,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 02:00:31,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2023-11-29 02:00:31,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2023-11-29 02:00:31,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:31,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2023-11-29 02:00:31,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,626 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,626 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 668 flow. Second operand 6 states and 182 transitions. [2023-11-29 02:00:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 159 transitions, 1368 flow [2023-11-29 02:00:31,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:31,644 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 666 flow [2023-11-29 02:00:31,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=666, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-11-29 02:00:31,644 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-11-29 02:00:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 666 flow [2023-11-29 02:00:31,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:31,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:00:31,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:00:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:00:31,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:31,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash 514088547, now seen corresponding path program 1 times [2023-11-29 02:00:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562303708] [2023-11-29 02:00:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:00:31,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562303708] [2023-11-29 02:00:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562303708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:31,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:31,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:31,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906324963] [2023-11-29 02:00:31,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:31,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:31,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:31,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 666 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:31,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:31,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:32,749 INFO L124 PetriNetUnfolderBase]: 3039/6077 cut-off events. [2023-11-29 02:00:32,749 INFO L125 PetriNetUnfolderBase]: For 13431/13461 co-relation queries the response was YES. [2023-11-29 02:00:32,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19128 conditions, 6077 events. 3039/6077 cut-off events. For 13431/13461 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38640 event pairs, 665 based on Foata normal form. 178/6252 useless extension candidates. Maximal degree in co-relation 16307. Up to 2981 conditions per place. [2023-11-29 02:00:32,780 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 108 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-11-29 02:00:32,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 1222 flow [2023-11-29 02:00:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:00:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:00:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2023-11-29 02:00:32,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2023-11-29 02:00:32,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 117 transitions. [2023-11-29 02:00:32,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 117 transitions. [2023-11-29 02:00:32,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:32,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 117 transitions. [2023-11-29 02:00:32,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:32,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:32,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:32,783 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 666 flow. Second operand 4 states and 117 transitions. [2023-11-29 02:00:32,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 1222 flow [2023-11-29 02:00:32,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 136 transitions, 1213 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 02:00:32,806 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 673 flow [2023-11-29 02:00:32,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=673, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2023-11-29 02:00:32,807 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 48 predicate places. [2023-11-29 02:00:32,807 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 673 flow [2023-11-29 02:00:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:32,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:32,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:32,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:00:32,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:32,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:32,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1283490780, now seen corresponding path program 1 times [2023-11-29 02:00:32,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:32,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27812437] [2023-11-29 02:00:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:32,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27812437] [2023-11-29 02:00:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27812437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:32,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:00:32,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873452658] [2023-11-29 02:00:32,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:00:32,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:32,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 673 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:32,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:32,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:32,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:33,685 INFO L124 PetriNetUnfolderBase]: 2991/6041 cut-off events. [2023-11-29 02:00:33,686 INFO L125 PetriNetUnfolderBase]: For 15784/15784 co-relation queries the response was YES. [2023-11-29 02:00:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 6041 events. 2991/6041 cut-off events. For 15784/15784 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 38617 event pairs, 479 based on Foata normal form. 108/6144 useless extension candidates. Maximal degree in co-relation 16556. Up to 3210 conditions per place. [2023-11-29 02:00:33,711 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2023-11-29 02:00:33,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1123 flow [2023-11-29 02:00:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:00:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:00:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2023-11-29 02:00:33,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104956268221577 [2023-11-29 02:00:33,713 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 165 transitions. [2023-11-29 02:00:33,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 165 transitions. [2023-11-29 02:00:33,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:33,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 165 transitions. [2023-11-29 02:00:33,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:33,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:33,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:33,714 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 673 flow. Second operand 7 states and 165 transitions. [2023-11-29 02:00:33,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1123 flow [2023-11-29 02:00:33,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1099 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:33,733 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 756 flow [2023-11-29 02:00:33,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=756, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-11-29 02:00:33,734 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-11-29 02:00:33,734 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 756 flow [2023-11-29 02:00:33,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:33,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:33,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:00:33,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:33,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash -261064186, now seen corresponding path program 1 times [2023-11-29 02:00:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:33,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227496311] [2023-11-29 02:00:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:33,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:33,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:33,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227496311] [2023-11-29 02:00:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227496311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:33,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464144616] [2023-11-29 02:00:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:33,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:00:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:33,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:00:33,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:34,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464144616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:34,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:34,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-29 02:00:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419110349] [2023-11-29 02:00:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:34,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:00:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:00:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:00:34,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:34,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 756 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:34,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:34,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:34,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:34,986 INFO L124 PetriNetUnfolderBase]: 2947/6007 cut-off events. [2023-11-29 02:00:34,987 INFO L125 PetriNetUnfolderBase]: For 19163/19163 co-relation queries the response was YES. [2023-11-29 02:00:35,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 6007 events. 2947/6007 cut-off events. For 19163/19163 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 38872 event pairs, 681 based on Foata normal form. 124/6126 useless extension candidates. Maximal degree in co-relation 17205. Up to 2982 conditions per place. [2023-11-29 02:00:35,025 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 87 selfloop transitions, 28 changer transitions 12/136 dead transitions. [2023-11-29 02:00:35,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1263 flow [2023-11-29 02:00:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:00:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:00:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2023-11-29 02:00:35,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2023-11-29 02:00:35,027 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2023-11-29 02:00:35,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2023-11-29 02:00:35,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:35,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2023-11-29 02:00:35,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:35,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:35,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:35,029 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 756 flow. Second operand 7 states and 166 transitions. [2023-11-29 02:00:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1263 flow [2023-11-29 02:00:35,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1244 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:35,053 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 876 flow [2023-11-29 02:00:35,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2023-11-29 02:00:35,053 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 54 predicate places. [2023-11-29 02:00:35,054 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 876 flow [2023-11-29 02:00:35,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:35,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:35,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:35,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:00:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:00:35,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:35,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1185810915, now seen corresponding path program 2 times [2023-11-29 02:00:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:35,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49912646] [2023-11-29 02:00:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:00:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49912646] [2023-11-29 02:00:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49912646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567949117] [2023-11-29 02:00:35,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:00:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:35,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:35,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:00:35,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:00:35,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:35,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:00:35,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:35,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567949117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:35,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-11-29 02:00:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052311160] [2023-11-29 02:00:35,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:00:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:00:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:00:35,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:35,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 876 flow. Second operand has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 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 02:00:35,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:35,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:35,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:36,824 INFO L124 PetriNetUnfolderBase]: 3024/6198 cut-off events. [2023-11-29 02:00:36,825 INFO L125 PetriNetUnfolderBase]: For 25402/25402 co-relation queries the response was YES. [2023-11-29 02:00:36,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21456 conditions, 6198 events. 3024/6198 cut-off events. For 25402/25402 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39272 event pairs, 483 based on Foata normal form. 68/6261 useless extension candidates. Maximal degree in co-relation 18986. Up to 1421 conditions per place. [2023-11-29 02:00:36,856 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 185 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2023-11-29 02:00:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 246 transitions, 2291 flow [2023-11-29 02:00:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:00:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:00:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 359 transitions. [2023-11-29 02:00:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884353741496599 [2023-11-29 02:00:36,858 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 359 transitions. [2023-11-29 02:00:36,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 359 transitions. [2023-11-29 02:00:36,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:36,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 359 transitions. [2023-11-29 02:00:36,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 23.933333333333334) internal successors, (359), 15 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:36,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:36,862 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:36,862 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 876 flow. Second operand 15 states and 359 transitions. [2023-11-29 02:00:36,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 246 transitions, 2291 flow [2023-11-29 02:00:36,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2254 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-29 02:00:36,889 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1342 flow [2023-11-29 02:00:36,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1342, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-11-29 02:00:36,889 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 69 predicate places. [2023-11-29 02:00:36,890 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1342 flow [2023-11-29 02:00:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 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 02:00:36,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:36,890 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 02:00:36,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:00:37,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:00:37,091 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:37,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1922043638, now seen corresponding path program 2 times [2023-11-29 02:00:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:37,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299590155] [2023-11-29 02:00:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:37,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299590155] [2023-11-29 02:00:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299590155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861405344] [2023-11-29 02:00:37,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:00:37,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:37,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:37,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:37,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:00:37,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:00:37,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:37,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:00:37,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:37,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861405344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:37,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 02:00:37,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231397246] [2023-11-29 02:00:37,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:37,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:00:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:00:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:00:37,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 02:00:37,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1342 flow. Second operand has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:37,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:37,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 02:00:37,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:39,608 INFO L124 PetriNetUnfolderBase]: 5288/10870 cut-off events. [2023-11-29 02:00:39,608 INFO L125 PetriNetUnfolderBase]: For 56351/56351 co-relation queries the response was YES. [2023-11-29 02:00:39,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38284 conditions, 10870 events. 5288/10870 cut-off events. For 56351/56351 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 67744 event pairs, 1005 based on Foata normal form. 234/11099 useless extension candidates. Maximal degree in co-relation 30700. Up to 2603 conditions per place. [2023-11-29 02:00:39,752 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 357 selfloop transitions, 76 changer transitions 0/442 dead transitions. [2023-11-29 02:00:39,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 442 transitions, 4309 flow [2023-11-29 02:00:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:00:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 02:00:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 673 transitions. [2023-11-29 02:00:39,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722789115646258 [2023-11-29 02:00:39,755 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 673 transitions. [2023-11-29 02:00:39,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 673 transitions. [2023-11-29 02:00:39,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:39,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 673 transitions. [2023-11-29 02:00:39,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 28.041666666666668) internal successors, (673), 24 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:39,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:39,762 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:39,762 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1342 flow. Second operand 24 states and 673 transitions. [2023-11-29 02:00:39,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 442 transitions, 4309 flow [2023-11-29 02:00:39,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 442 transitions, 4285 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-29 02:00:39,831 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 2173 flow [2023-11-29 02:00:39,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2173, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2023-11-29 02:00:39,832 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 96 predicate places. [2023-11-29 02:00:39,832 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 2173 flow [2023-11-29 02:00:39,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:39,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:39,833 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:39,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:00:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:00:40,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:40,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash 676157993, now seen corresponding path program 3 times [2023-11-29 02:00:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:40,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838404015] [2023-11-29 02:00:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838404015] [2023-11-29 02:00:40,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838404015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277631951] [2023-11-29 02:00:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:00:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:40,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:40,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:00:40,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 02:00:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:40,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:00:40,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:40,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277631951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:40,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:40,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-29 02:00:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956389863] [2023-11-29 02:00:40,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:40,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:00:40,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:00:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:00:40,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:40,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 2173 flow. Second operand has 22 states, 22 states have (on average 17.09090909090909) internal successors, (376), 22 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:40,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:40,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:40,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:43,529 INFO L124 PetriNetUnfolderBase]: 7243/14769 cut-off events. [2023-11-29 02:00:43,529 INFO L125 PetriNetUnfolderBase]: For 91527/91527 co-relation queries the response was YES. [2023-11-29 02:00:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53857 conditions, 14769 events. 7243/14769 cut-off events. For 91527/91527 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 98182 event pairs, 767 based on Foata normal form. 108/14872 useless extension candidates. Maximal degree in co-relation 50966. Up to 2506 conditions per place. [2023-11-29 02:00:43,623 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 307 selfloop transitions, 141 changer transitions 0/457 dead transitions. [2023-11-29 02:00:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 457 transitions, 5178 flow [2023-11-29 02:00:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:00:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:00:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 621 transitions. [2023-11-29 02:00:43,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48744113029827313 [2023-11-29 02:00:43,625 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 621 transitions. [2023-11-29 02:00:43,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 621 transitions. [2023-11-29 02:00:43,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:43,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 621 transitions. [2023-11-29 02:00:43,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 23.884615384615383) internal successors, (621), 26 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:43,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:43,629 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:43,629 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 2173 flow. Second operand 26 states and 621 transitions. [2023-11-29 02:00:43,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 457 transitions, 5178 flow [2023-11-29 02:00:43,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 457 transitions, 5058 flow, removed 45 selfloop flow, removed 7 redundant places. [2023-11-29 02:00:43,743 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 3435 flow [2023-11-29 02:00:43,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3435, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2023-11-29 02:00:43,744 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 124 predicate places. [2023-11-29 02:00:43,744 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 3435 flow [2023-11-29 02:00:43,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.09090909090909) internal successors, (376), 22 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:43,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:43,744 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:43,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:00:43,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:00:43,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:43,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2096798769, now seen corresponding path program 4 times [2023-11-29 02:00:43,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:43,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80106257] [2023-11-29 02:00:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80106257] [2023-11-29 02:00:44,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80106257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:44,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297879938] [2023-11-29 02:00:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:00:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:44,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:44,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:00:44,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:00:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:44,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:00:44,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:44,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297879938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:44,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2023-11-29 02:00:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920492277] [2023-11-29 02:00:44,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:00:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:00:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:00:44,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:44,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 3435 flow. Second operand has 30 states, 30 states have (on average 17.066666666666666) internal successors, (512), 30 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:44,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:44,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:44,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:49,502 INFO L124 PetriNetUnfolderBase]: 10036/20416 cut-off events. [2023-11-29 02:00:49,502 INFO L125 PetriNetUnfolderBase]: For 159033/159033 co-relation queries the response was YES. [2023-11-29 02:00:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77053 conditions, 20416 events. 10036/20416 cut-off events. For 159033/159033 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 141842 event pairs, 971 based on Foata normal form. 218/20629 useless extension candidates. Maximal degree in co-relation 75656. Up to 3481 conditions per place. [2023-11-29 02:00:49,669 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 420 selfloop transitions, 222 changer transitions 0/651 dead transitions. [2023-11-29 02:00:49,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 651 transitions, 7846 flow [2023-11-29 02:00:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:00:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 02:00:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 882 transitions. [2023-11-29 02:00:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-11-29 02:00:49,672 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 882 transitions. [2023-11-29 02:00:49,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 882 transitions. [2023-11-29 02:00:49,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:49,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 882 transitions. [2023-11-29 02:00:49,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 23.83783783783784) internal successors, (882), 37 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:49,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 49.0) internal successors, (1862), 38 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:49,677 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 49.0) internal successors, (1862), 38 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:49,677 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 3435 flow. Second operand 37 states and 882 transitions. [2023-11-29 02:00:49,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 651 transitions, 7846 flow [2023-11-29 02:00:49,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 651 transitions, 7536 flow, removed 84 selfloop flow, removed 7 redundant places. [2023-11-29 02:00:49,941 INFO L231 Difference]: Finished difference. Result has 209 places, 279 transitions, 5130 flow [2023-11-29 02:00:49,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5130, PETRI_PLACES=209, PETRI_TRANSITIONS=279} [2023-11-29 02:00:49,942 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 162 predicate places. [2023-11-29 02:00:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 279 transitions, 5130 flow [2023-11-29 02:00:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 17.066666666666666) internal successors, (512), 30 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:00:49,943 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:49,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:00:50,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:00:50,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:00:50,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -202893923, now seen corresponding path program 5 times [2023-11-29 02:00:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608906963] [2023-11-29 02:00:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:50,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:50,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608906963] [2023-11-29 02:00:50,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608906963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:50,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322511311] [2023-11-29 02:00:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:00:50,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:50,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:00:51,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 02:00:51,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:51,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:00:51,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:51,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:00:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322511311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:51,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:51,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2023-11-29 02:00:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273824553] [2023-11-29 02:00:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 02:00:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 02:00:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:00:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:00:52,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 279 transitions, 5130 flow. Second operand has 38 states, 38 states have (on average 17.05263157894737) internal successors, (648), 38 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:52,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:00:52,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:00:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:00:59,530 INFO L124 PetriNetUnfolderBase]: 14157/28765 cut-off events. [2023-11-29 02:00:59,530 INFO L125 PetriNetUnfolderBase]: For 260447/260447 co-relation queries the response was YES. [2023-11-29 02:00:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111326 conditions, 28765 events. 14157/28765 cut-off events. For 260447/260447 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 205141 event pairs, 1285 based on Foata normal form. 316/29076 useless extension candidates. Maximal degree in co-relation 109546. Up to 4918 conditions per place. [2023-11-29 02:00:59,933 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 542 selfloop transitions, 323 changer transitions 0/874 dead transitions. [2023-11-29 02:00:59,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 874 transitions, 11296 flow [2023-11-29 02:00:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:00:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 02:00:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1143 transitions. [2023-11-29 02:00:59,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48596938775510207 [2023-11-29 02:00:59,937 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1143 transitions. [2023-11-29 02:00:59,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1143 transitions. [2023-11-29 02:00:59,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:00:59,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1143 transitions. [2023-11-29 02:00:59,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 23.8125) internal successors, (1143), 48 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:59,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 49.0) internal successors, (2401), 49 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:59,944 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 49.0) internal successors, (2401), 49 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:00:59,944 INFO L175 Difference]: Start difference. First operand has 209 places, 279 transitions, 5130 flow. Second operand 48 states and 1143 transitions. [2023-11-29 02:00:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 874 transitions, 11296 flow [2023-11-29 02:01:00,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 874 transitions, 10739 flow, removed 265 selfloop flow, removed 6 redundant places. [2023-11-29 02:01:00,458 INFO L231 Difference]: Finished difference. Result has 262 places, 385 transitions, 7618 flow [2023-11-29 02:01:00,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=7618, PETRI_PLACES=262, PETRI_TRANSITIONS=385} [2023-11-29 02:01:00,459 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 215 predicate places. [2023-11-29 02:01:00,460 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 385 transitions, 7618 flow [2023-11-29 02:01:00,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 17.05263157894737) internal successors, (648), 38 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:00,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:00,460 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:00,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:01:00,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:00,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:01:00,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash 238012475, now seen corresponding path program 1 times [2023-11-29 02:01:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:00,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212750712] [2023-11-29 02:01:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 02:01:01,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:01,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212750712] [2023-11-29 02:01:01,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212750712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:01,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270314415] [2023-11-29 02:01:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:01,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:01,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:01,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:01:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:01,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:01:01,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 02:01:01,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 02:01:01,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270314415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:01,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:01:01,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 24 [2023-11-29 02:01:01,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778572575] [2023-11-29 02:01:01,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:01,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:01:01,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:01:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:01:01,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:01:01,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 385 transitions, 7618 flow. Second operand has 26 states, 26 states have (on average 17.692307692307693) internal successors, (460), 26 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:01,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:01,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:01:01,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:15,584 INFO L124 PetriNetUnfolderBase]: 24095/49397 cut-off events. [2023-11-29 02:01:15,584 INFO L125 PetriNetUnfolderBase]: For 464451/464451 co-relation queries the response was YES. [2023-11-29 02:01:16,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195251 conditions, 49397 events. 24095/49397 cut-off events. For 464451/464451 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 409394 event pairs, 3127 based on Foata normal form. 324/49716 useless extension candidates. Maximal degree in co-relation 187908. Up to 10645 conditions per place. [2023-11-29 02:01:16,216 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 441 selfloop transitions, 604 changer transitions 0/1054 dead transitions. [2023-11-29 02:01:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1054 transitions, 19447 flow [2023-11-29 02:01:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:01:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 02:01:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 651 transitions. [2023-11-29 02:01:16,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 02:01:16,220 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 651 transitions. [2023-11-29 02:01:16,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 651 transitions. [2023-11-29 02:01:16,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:16,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 651 transitions. [2023-11-29 02:01:16,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 24.11111111111111) internal successors, (651), 27 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:16,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:16,226 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:16,226 INFO L175 Difference]: Start difference. First operand has 262 places, 385 transitions, 7618 flow. Second operand 27 states and 651 transitions. [2023-11-29 02:01:16,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1054 transitions, 19447 flow [2023-11-29 02:01:17,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1054 transitions, 18685 flow, removed 323 selfloop flow, removed 10 redundant places. [2023-11-29 02:01:17,844 INFO L231 Difference]: Finished difference. Result has 291 places, 784 transitions, 17286 flow [2023-11-29 02:01:17,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17286, PETRI_PLACES=291, PETRI_TRANSITIONS=784} [2023-11-29 02:01:17,845 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 244 predicate places. [2023-11-29 02:01:17,845 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 784 transitions, 17286 flow [2023-11-29 02:01:17,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.692307692307693) internal successors, (460), 26 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:17,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:17,845 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:17,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:01:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:18,046 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:01:18,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -451486999, now seen corresponding path program 6 times [2023-11-29 02:01:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32443225] [2023-11-29 02:01:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:01:18,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:18,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32443225] [2023-11-29 02:01:18,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32443225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:18,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728083545] [2023-11-29 02:01:18,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:01:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:18,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:18,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:18,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:01:19,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 02:01:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:19,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:01:19,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:01:19,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:01:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728083545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:20,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:01:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2023-11-29 02:01:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631447863] [2023-11-29 02:01:20,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:20,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:01:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:01:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:01:20,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:01:20,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 784 transitions, 17286 flow. Second operand has 46 states, 46 states have (on average 17.043478260869566) internal successors, (784), 46 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:20,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:20,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:01:20,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:43,181 INFO L124 PetriNetUnfolderBase]: 30584/62244 cut-off events. [2023-11-29 02:01:43,182 INFO L125 PetriNetUnfolderBase]: For 712377/712377 co-relation queries the response was YES. [2023-11-29 02:01:43,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251256 conditions, 62244 events. 30584/62244 cut-off events. For 712377/712377 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 512102 event pairs, 3379 based on Foata normal form. 392/62631 useless extension candidates. Maximal degree in co-relation 236286. Up to 10803 conditions per place. [2023-11-29 02:01:43,930 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 744 selfloop transitions, 833 changer transitions 0/1586 dead transitions. [2023-11-29 02:01:43,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1586 transitions, 27280 flow [2023-11-29 02:01:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 02:01:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-29 02:01:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1404 transitions. [2023-11-29 02:01:43,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48564510549982703 [2023-11-29 02:01:43,935 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 1404 transitions. [2023-11-29 02:01:43,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 1404 transitions. [2023-11-29 02:01:43,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:43,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 1404 transitions. [2023-11-29 02:01:43,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 23.796610169491526) internal successors, (1404), 59 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:43,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 49.0) internal successors, (2940), 60 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 02:01:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 49.0) internal successors, (2940), 60 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 02:01:43,943 INFO L175 Difference]: Start difference. First operand has 291 places, 784 transitions, 17286 flow. Second operand 59 states and 1404 transitions. [2023-11-29 02:01:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1586 transitions, 27280 flow [2023-11-29 02:01:47,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1586 transitions, 26676 flow, removed 297 selfloop flow, removed 3 redundant places. [2023-11-29 02:01:47,088 INFO L231 Difference]: Finished difference. Result has 363 places, 971 transitions, 23061 flow [2023-11-29 02:01:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=16659, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=23061, PETRI_PLACES=363, PETRI_TRANSITIONS=971} [2023-11-29 02:01:47,089 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 316 predicate places. [2023-11-29 02:01:47,089 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 971 transitions, 23061 flow [2023-11-29 02:01:47,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 17.043478260869566) internal successors, (784), 46 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:47,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:47,089 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:47,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:01:47,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:01:47,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:01:47,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1887063738, now seen corresponding path program 2 times [2023-11-29 02:01:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108333349] [2023-11-29 02:01:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:47,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 548 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:01:48,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:48,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108333349] [2023-11-29 02:01:48,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108333349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:48,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469539189] [2023-11-29 02:01:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:01:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:48,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:48,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:01:48,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:01:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:48,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:01:48,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:01:48,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:01:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469539189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:48,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:01:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 42 [2023-11-29 02:01:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821086781] [2023-11-29 02:01:48,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:01:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:01:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:01:49,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:01:49,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 971 transitions, 23061 flow. Second operand has 44 states, 44 states have (on average 17.227272727272727) internal successors, (758), 44 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:49,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:49,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:01:49,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:40,824 INFO L124 PetriNetUnfolderBase]: 52556/107150 cut-off events. [2023-11-29 02:02:40,824 INFO L125 PetriNetUnfolderBase]: For 1257445/1257445 co-relation queries the response was YES. [2023-11-29 02:02:42,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447153 conditions, 107150 events. 52556/107150 cut-off events. For 1257445/1257445 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 976546 event pairs, 8793 based on Foata normal form. 232/107377 useless extension candidates. Maximal degree in co-relation 427748. Up to 19173 conditions per place. [2023-11-29 02:02:42,638 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 1021 selfloop transitions, 1336 changer transitions 0/2366 dead transitions. [2023-11-29 02:02:42,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2366 transitions, 49735 flow [2023-11-29 02:02:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:02:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 02:02:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1237 transitions. [2023-11-29 02:02:42,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49499799919967985 [2023-11-29 02:02:42,641 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 1237 transitions. [2023-11-29 02:02:42,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 1237 transitions. [2023-11-29 02:02:42,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:42,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 1237 transitions. [2023-11-29 02:02:42,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 24.254901960784313) internal successors, (1237), 51 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:42,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 49.0) internal successors, (2548), 52 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:42,647 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 49.0) internal successors, (2548), 52 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:42,647 INFO L175 Difference]: Start difference. First operand has 363 places, 971 transitions, 23061 flow. Second operand 51 states and 1237 transitions. [2023-11-29 02:02:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2366 transitions, 49735 flow [2023-11-29 02:02:52,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 2366 transitions, 48857 flow, removed 340 selfloop flow, removed 13 redundant places. [2023-11-29 02:02:52,435 INFO L231 Difference]: Finished difference. Result has 425 places, 1759 transitions, 45945 flow [2023-11-29 02:02:52,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=22516, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=45945, PETRI_PLACES=425, PETRI_TRANSITIONS=1759} [2023-11-29 02:02:52,436 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 378 predicate places. [2023-11-29 02:02:52,437 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1759 transitions, 45945 flow [2023-11-29 02:02:52,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.227272727272727) internal successors, (758), 44 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:52,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:52,437 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:52,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:02:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:52,637 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:02:52,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2020619662, now seen corresponding path program 3 times [2023-11-29 02:02:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:52,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537806409] [2023-11-29 02:02:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:52,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:02:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537806409] [2023-11-29 02:02:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537806409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:02:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751744002] [2023-11-29 02:02:53,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:02:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:53,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:53,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:02:54,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 02:02:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:02:54,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:02:54,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:02:54,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:02:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751744002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:54,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:02:54,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 42 [2023-11-29 02:02:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844383389] [2023-11-29 02:02:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:54,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:02:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:02:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:02:54,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:02:54,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1759 transitions, 45945 flow. Second operand has 44 states, 44 states have (on average 17.227272727272727) internal successors, (758), 44 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:54,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:54,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:02:54,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:04:52,138 INFO L124 PetriNetUnfolderBase]: 79779/162467 cut-off events. [2023-11-29 02:04:52,138 INFO L125 PetriNetUnfolderBase]: For 2251791/2251791 co-relation queries the response was YES. [2023-11-29 02:04:54,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703022 conditions, 162467 events. 79779/162467 cut-off events. For 2251791/2251791 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 1576825 event pairs, 10597 based on Foata normal form. 592/163054 useless extension candidates. Maximal degree in co-relation 675747. Up to 28494 conditions per place. [2023-11-29 02:04:55,226 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 958 selfloop transitions, 2432 changer transitions 0/3399 dead transitions. [2023-11-29 02:04:55,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 3399 transitions, 81869 flow [2023-11-29 02:04:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:04:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-29 02:04:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1334 transitions. [2023-11-29 02:04:55,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47762262799856786 [2023-11-29 02:04:55,229 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 1334 transitions. [2023-11-29 02:04:55,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 1334 transitions. [2023-11-29 02:04:55,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:04:55,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 1334 transitions. [2023-11-29 02:04:55,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 23.403508771929825) internal successors, (1334), 57 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:55,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 49.0) internal successors, (2842), 58 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:55,238 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 49.0) internal successors, (2842), 58 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:55,238 INFO L175 Difference]: Start difference. First operand has 425 places, 1759 transitions, 45945 flow. Second operand 57 states and 1334 transitions. [2023-11-29 02:04:55,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 3399 transitions, 81869 flow [2023-11-29 02:05:21,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 3399 transitions, 80857 flow, removed 504 selfloop flow, removed 2 redundant places. [2023-11-29 02:05:21,547 INFO L231 Difference]: Finished difference. Result has 504 places, 2835 transitions, 80074 flow [2023-11-29 02:05:21,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=44585, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=80074, PETRI_PLACES=504, PETRI_TRANSITIONS=2835} [2023-11-29 02:05:21,549 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 457 predicate places. [2023-11-29 02:05:21,549 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2835 transitions, 80074 flow [2023-11-29 02:05:21,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 17.227272727272727) internal successors, (758), 44 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:21,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:05:21,550 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:21,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:05:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:21,750 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 02:05:21,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash -982999079, now seen corresponding path program 4 times [2023-11-29 02:05:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:21,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868748700] [2023-11-29 02:05:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 558 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 02:05:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868748700] [2023-11-29 02:05:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868748700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322925335] [2023-11-29 02:05:22,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:05:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:22,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:22,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e3a24-ac89-4057-bebd-801f3ebf5a33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:05:22,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:05:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:22,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:05:22,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 02:05:22,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 02:05:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322925335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:23,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:23,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 40 [2023-11-29 02:05:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412917240] [2023-11-29 02:05:23,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:23,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:05:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:05:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1354, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:05:23,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 02:05:23,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2835 transitions, 80074 flow. Second operand has 42 states, 42 states have (on average 17.428571428571427) internal successors, (732), 42 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:23,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:05:23,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 02:05:23,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:23,285 INFO L124 PetriNetUnfolderBase]: 147523/300299 cut-off events. [2023-11-29 02:11:23,285 INFO L125 PetriNetUnfolderBase]: For 4522847/4522847 co-relation queries the response was YES. [2023-11-29 02:11:29,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1356544 conditions, 300299 events. 147523/300299 cut-off events. For 4522847/4522847 co-relation queries the response was YES. Maximal size of possible extension queue 2280. Compared 3128341 event pairs, 17971 based on Foata normal form. 544/300838 useless extension candidates. Maximal degree in co-relation 1325811. Up to 53000 conditions per place. [2023-11-29 02:11:30,674 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 1062 selfloop transitions, 5057 changer transitions 0/6128 dead transitions. [2023-11-29 02:11:30,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 6128 transitions, 170221 flow [2023-11-29 02:11:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:11:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-29 02:11:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 1185 transitions. [2023-11-29 02:11:30,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48367346938775513 [2023-11-29 02:11:30,677 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 1185 transitions. [2023-11-29 02:11:30,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 1185 transitions. [2023-11-29 02:11:30,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:30,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 1185 transitions. [2023-11-29 02:11:30,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 23.7) internal successors, (1185), 50 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:30,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 49.0) internal successors, (2499), 51 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:30,683 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 49.0) internal successors, (2499), 51 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:30,683 INFO L175 Difference]: Start difference. First operand has 504 places, 2835 transitions, 80074 flow. Second operand 50 states and 1185 transitions. [2023-11-29 02:11:30,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 6128 transitions, 170221 flow