./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:10:27,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:10:27,322 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 23:10:27,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:10:27,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:10:27,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:10:27,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:10:27,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:10:27,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:10:27,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:10:27,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:10:27,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:10:27,386 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:10:27,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:10:27,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:10:27,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:10:27,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:10:27,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:10:27,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:10:27,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:10:27,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:10:27,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:10:27,393 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 23:10:27,393 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:10:27,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:10:27,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:10:27,395 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:10:27,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:10:27,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:10:27,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:10:27,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:27,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:10:27,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:10:27,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:10:27,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:10:27,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:10:27,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:10:27,400 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:10:27,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:10:27,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:10:27,401 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:10:27,402 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_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2023-11-06 23:10:27,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:10:27,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:10:27,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:10:27,728 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:10:27,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:10:27,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 23:10:30,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:10:31,232 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:10:31,233 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 23:10:31,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/data/5449bb4a0/d79b400f35ec4c3a85f16bc8ee4efd78/FLAG84be2818b [2023-11-06 23:10:31,270 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/data/5449bb4a0/d79b400f35ec4c3a85f16bc8ee4efd78 [2023-11-06 23:10:31,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:10:31,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:10:31,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:31,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:10:31,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:10:31,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb8672a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31, skipping insertion in model container [2023-11-06 23:10:31,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,313 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:10:31,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:31,535 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:10:31,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:31,563 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:10:31,563 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:10:31,571 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:10:31,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31 WrapperNode [2023-11-06 23:10:31,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:31,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:31,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:10:31,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:10:31,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,588 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,605 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-11-06 23:10:31,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:31,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:10:31,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:10:31,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:10:31,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,630 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:10:31,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:10:31,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:10:31,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:10:31,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (1/1) ... [2023-11-06 23:10:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:31,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:10:31,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:10:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:10:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:10:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:10:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:10:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:10:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:10:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:10:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:10:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:10:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:10:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:10:31,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:10:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:10:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:10:31,710 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:10:31,810 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:10:31,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:10:32,033 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:10:32,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:10:32,140 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:10:32,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:32 BoogieIcfgContainer [2023-11-06 23:10:32,143 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:10:32,146 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:10:32,147 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:10:32,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:10:32,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:10:31" (1/3) ... [2023-11-06 23:10:32,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5a441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:32, skipping insertion in model container [2023-11-06 23:10:32,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:31" (2/3) ... [2023-11-06 23:10:32,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5a441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:32, skipping insertion in model container [2023-11-06 23:10:32,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:32" (3/3) ... [2023-11-06 23:10:32,154 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 23:10:32,168 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:10:32,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:10:32,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 23:10:32,184 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:10:32,309 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:10:32,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 101 transitions, 216 flow [2023-11-06 23:10:32,406 INFO L124 PetriNetUnfolderBase]: 6/99 cut-off events. [2023-11-06 23:10:32,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:10:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 6/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-06 23:10:32,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 101 transitions, 216 flow [2023-11-06 23:10:32,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 78 transitions, 168 flow [2023-11-06 23:10:32,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:10:32,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 78 transitions, 168 flow [2023-11-06 23:10:32,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 78 transitions, 168 flow [2023-11-06 23:10:32,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 78 transitions, 168 flow [2023-11-06 23:10:32,501 INFO L124 PetriNetUnfolderBase]: 5/78 cut-off events. [2023-11-06 23:10:32,502 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:10:32,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-06 23:10:32,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-06 23:10:35,946 INFO L134 LiptonReduction]: Checked pairs total: 1005 [2023-11-06 23:10:35,946 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-11-06 23:10:35,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:10:35,971 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=LoopsAndPotentialCycles, 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;@33f76994, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:10:35,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 23:10:35,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:10:35,975 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-06 23:10:35,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:10:35,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:35,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:10:35,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:35,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 12482527, now seen corresponding path program 1 times [2023-11-06 23:10:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400968946] [2023-11-06 23:10:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:36,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400968946] [2023-11-06 23:10:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400968946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:36,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:36,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:10:36,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195692108] [2023-11-06 23:10:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:36,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:36,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:36,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:36,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:36,490 INFO L124 PetriNetUnfolderBase]: 231/357 cut-off events. [2023-11-06 23:10:36,491 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-06 23:10:36,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 357 events. 231/357 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 1341 event pairs, 39 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 619. Up to 309 conditions per place. [2023-11-06 23:10:36,498 INFO L140 encePairwiseOnDemand]: 164/174 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-11-06 23:10:36,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 165 flow [2023-11-06 23:10:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-11-06 23:10:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574712643678161 [2023-11-06 23:10:36,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-11-06 23:10:36,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-11-06 23:10:36,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:36,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-11-06 23:10:36,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,548 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 291 transitions. [2023-11-06 23:10:36,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 165 flow [2023-11-06 23:10:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:10:36,554 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 84 flow [2023-11-06 23:10:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-06 23:10:36,562 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-06 23:10:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 84 flow [2023-11-06 23:10:36,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:36,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:10:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:10:36,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:36,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash 386960315, now seen corresponding path program 1 times [2023-11-06 23:10:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444284285] [2023-11-06 23:10:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:36,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444284285] [2023-11-06 23:10:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444284285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573311892] [2023-11-06 23:10:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:36,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:36,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:10:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:36,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:36,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:36,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:36,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573311892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:36,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:36,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 23:10:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918881743] [2023-11-06 23:10:36,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:36,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 174 [2023-11-06 23:10:36,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:36,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:36,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 174 [2023-11-06 23:10:36,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:37,082 INFO L124 PetriNetUnfolderBase]: 206/325 cut-off events. [2023-11-06 23:10:37,083 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 23:10:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 325 events. 206/325 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1276 event pairs, 38 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 235. Up to 184 conditions per place. [2023-11-06 23:10:37,090 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-11-06 23:10:37,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 185 flow [2023-11-06 23:10:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:10:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 363 transitions. [2023-11-06 23:10:37,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521551724137931 [2023-11-06 23:10:37,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 363 transitions. [2023-11-06 23:10:37,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 363 transitions. [2023-11-06 23:10:37,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:37,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 363 transitions. [2023-11-06 23:10:37,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,109 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,109 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 84 flow. Second operand 4 states and 363 transitions. [2023-11-06 23:10:37,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 185 flow [2023-11-06 23:10:37,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:37,112 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 84 flow [2023-11-06 23:10:37,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-06 23:10:37,114 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-11-06 23:10:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 84 flow [2023-11-06 23:10:37,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:37,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:10:37,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:10:37,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:37,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash 386960314, now seen corresponding path program 1 times [2023-11-06 23:10:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:37,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087271738] [2023-11-06 23:10:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:37,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:37,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087271738] [2023-11-06 23:10:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087271738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895004574] [2023-11-06 23:10:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:37,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:37,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:10:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:37,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:37,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:37,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895004574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:37,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:37,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:10:37,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415915181] [2023-11-06 23:10:37,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:37,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:37,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:37,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:37,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 174 [2023-11-06 23:10:37,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:37,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 174 [2023-11-06 23:10:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:37,807 INFO L124 PetriNetUnfolderBase]: 482/727 cut-off events. [2023-11-06 23:10:37,807 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-06 23:10:37,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 727 events. 482/727 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3235 event pairs, 52 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 578. Up to 361 conditions per place. [2023-11-06 23:10:37,816 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2023-11-06 23:10:37,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 65 transitions, 334 flow [2023-11-06 23:10:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:10:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:10:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-11-06 23:10:37,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306513409961686 [2023-11-06 23:10:37,821 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-11-06 23:10:37,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-11-06 23:10:37,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:37,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-11-06 23:10:37,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,829 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,829 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 84 flow. Second operand 6 states and 554 transitions. [2023-11-06 23:10:37,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 65 transitions, 334 flow [2023-11-06 23:10:37,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 65 transitions, 324 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 23:10:37,833 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 129 flow [2023-11-06 23:10:37,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-06 23:10:37,834 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-06 23:10:37,834 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 129 flow [2023-11-06 23:10:37,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:37,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:37,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:10:37,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:38,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:38,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash 386960264, now seen corresponding path program 1 times [2023-11-06 23:10:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952077609] [2023-11-06 23:10:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:38,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:38,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952077609] [2023-11-06 23:10:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952077609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:38,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314060156] [2023-11-06 23:10:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:38,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:38,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:38,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:38,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314060156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:38,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 23:10:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550949248] [2023-11-06 23:10:38,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:38,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:38,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 129 flow. Second operand has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:38,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:38,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:38,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:38,612 INFO L124 PetriNetUnfolderBase]: 689/1070 cut-off events. [2023-11-06 23:10:38,612 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-11-06 23:10:38,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 1070 events. 689/1070 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4792 event pairs, 41 based on Foata normal form. 46/888 useless extension candidates. Maximal degree in co-relation 1160. Up to 468 conditions per place. [2023-11-06 23:10:38,622 INFO L140 encePairwiseOnDemand]: 165/174 looper letters, 87 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2023-11-06 23:10:38,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 123 transitions, 753 flow [2023-11-06 23:10:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:10:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:10:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 688 transitions. [2023-11-06 23:10:38,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648604269293924 [2023-11-06 23:10:38,629 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 688 transitions. [2023-11-06 23:10:38,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 688 transitions. [2023-11-06 23:10:38,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:38,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 688 transitions. [2023-11-06 23:10:38,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.28571428571429) internal successors, (688), 7 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:38,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:38,638 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:38,638 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 129 flow. Second operand 7 states and 688 transitions. [2023-11-06 23:10:38,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 123 transitions, 753 flow [2023-11-06 23:10:38,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 123 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:38,651 INFO L231 Difference]: Finished difference. Result has 44 places, 59 transitions, 481 flow [2023-11-06 23:10:38,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=44, PETRI_TRANSITIONS=59} [2023-11-06 23:10:38,653 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-11-06 23:10:38,653 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 59 transitions, 481 flow [2023-11-06 23:10:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:38,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:10:38,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:10:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:38,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 386960263, now seen corresponding path program 1 times [2023-11-06 23:10:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:38,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975362834] [2023-11-06 23:10:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975362834] [2023-11-06 23:10:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975362834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399258254] [2023-11-06 23:10:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:38,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:39,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:39,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:39,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399258254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:39,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:39,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 23:10:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560201406] [2023-11-06 23:10:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:39,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:39,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:39,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 59 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:39,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:39,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:39,277 INFO L124 PetriNetUnfolderBase]: 705/1129 cut-off events. [2023-11-06 23:10:39,278 INFO L125 PetriNetUnfolderBase]: For 2393/2393 co-relation queries the response was YES. [2023-11-06 23:10:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 1129 events. 705/1129 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5231 event pairs, 86 based on Foata normal form. 136/1159 useless extension candidates. Maximal degree in co-relation 2500. Up to 591 conditions per place. [2023-11-06 23:10:39,293 INFO L140 encePairwiseOnDemand]: 165/174 looper letters, 47 selfloop transitions, 29 changer transitions 0/78 dead transitions. [2023-11-06 23:10:39,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 759 flow [2023-11-06 23:10:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:10:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-11-06 23:10:39,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316091954022989 [2023-11-06 23:10:39,296 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-11-06 23:10:39,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-11-06 23:10:39,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:39,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-11-06 23:10:39,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,300 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,301 INFO L175 Difference]: Start difference. First operand has 44 places, 59 transitions, 481 flow. Second operand 4 states and 370 transitions. [2023-11-06 23:10:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 759 flow [2023-11-06 23:10:39,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 677 flow, removed 41 selfloop flow, removed 0 redundant places. [2023-11-06 23:10:39,320 INFO L231 Difference]: Finished difference. Result has 48 places, 65 transitions, 618 flow [2023-11-06 23:10:39,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=618, PETRI_PLACES=48, PETRI_TRANSITIONS=65} [2023-11-06 23:10:39,322 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-11-06 23:10:39,323 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 65 transitions, 618 flow [2023-11-06 23:10:39,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:39,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:39,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:39,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:39,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1365173245, now seen corresponding path program 1 times [2023-11-06 23:10:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238580608] [2023-11-06 23:10:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:39,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238580608] [2023-11-06 23:10:39,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238580608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:39,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:39,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:10:39,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5536591] [2023-11-06 23:10:39,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:39,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 65 transitions, 618 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:39,875 INFO L124 PetriNetUnfolderBase]: 729/1248 cut-off events. [2023-11-06 23:10:39,876 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2023-11-06 23:10:39,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 1248 events. 729/1248 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6183 event pairs, 283 based on Foata normal form. 22/1179 useless extension candidates. Maximal degree in co-relation 2729. Up to 1049 conditions per place. [2023-11-06 23:10:39,890 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 83 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-06 23:10:39,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 89 transitions, 962 flow [2023-11-06 23:10:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-11-06 23:10:39,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440613026819924 [2023-11-06 23:10:39,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-11-06 23:10:39,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-11-06 23:10:39,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:39,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-11-06 23:10:39,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,897 INFO L175 Difference]: Start difference. First operand has 48 places, 65 transitions, 618 flow. Second operand 3 states and 284 transitions. [2023-11-06 23:10:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 89 transitions, 962 flow [2023-11-06 23:10:39,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 889 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:39,922 INFO L231 Difference]: Finished difference. Result has 50 places, 69 transitions, 634 flow [2023-11-06 23:10:39,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=634, PETRI_PLACES=50, PETRI_TRANSITIONS=69} [2023-11-06 23:10:39,923 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-11-06 23:10:39,923 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 69 transitions, 634 flow [2023-11-06 23:10:39,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:39,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:39,924 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 23:10:39,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:10:39,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:39,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash 242915921, now seen corresponding path program 2 times [2023-11-06 23:10:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:39,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386059594] [2023-11-06 23:10:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:40,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:40,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386059594] [2023-11-06 23:10:40,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386059594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:40,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45243357] [2023-11-06 23:10:40,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:40,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:40,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:40,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:40,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:40,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:10:40,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:40,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:40,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:10:40,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:40,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45243357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:40,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-06 23:10:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151852785] [2023-11-06 23:10:40,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:40,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:40,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:10:40,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 174 [2023-11-06 23:10:40,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 69 transitions, 634 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:40,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 174 [2023-11-06 23:10:40,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:40,301 INFO L124 PetriNetUnfolderBase]: 587/1009 cut-off events. [2023-11-06 23:10:40,301 INFO L125 PetriNetUnfolderBase]: For 2923/2958 co-relation queries the response was YES. [2023-11-06 23:10:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4211 conditions, 1009 events. 587/1009 cut-off events. For 2923/2958 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4950 event pairs, 291 based on Foata normal form. 94/999 useless extension candidates. Maximal degree in co-relation 2824. Up to 1005 conditions per place. [2023-11-06 23:10:40,313 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 58 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-11-06 23:10:40,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 655 flow [2023-11-06 23:10:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-11-06 23:10:40,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076628352490421 [2023-11-06 23:10:40,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-11-06 23:10:40,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-11-06 23:10:40,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:40,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-11-06 23:10:40,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,320 INFO L175 Difference]: Start difference. First operand has 50 places, 69 transitions, 634 flow. Second operand 3 states and 265 transitions. [2023-11-06 23:10:40,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 655 flow [2023-11-06 23:10:40,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 624 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:10:40,337 INFO L231 Difference]: Finished difference. Result has 47 places, 61 transitions, 508 flow [2023-11-06 23:10:40,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=47, PETRI_TRANSITIONS=61} [2023-11-06 23:10:40,339 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-11-06 23:10:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 61 transitions, 508 flow [2023-11-06 23:10:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:40,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 23:10:40,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:40,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:40,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 242915871, now seen corresponding path program 2 times [2023-11-06 23:10:40,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:40,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128194608] [2023-11-06 23:10:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128194608] [2023-11-06 23:10:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128194608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988711123] [2023-11-06 23:10:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:40,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:40,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:40,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:40,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:40,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:40,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:10:40,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:40,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988711123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:40,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 23:10:40,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799989775] [2023-11-06 23:10:40,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:40,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:10:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:10:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:40,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:40,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 61 transitions, 508 flow. Second operand has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:40,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:40,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:40,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:41,476 INFO L124 PetriNetUnfolderBase]: 1441/2579 cut-off events. [2023-11-06 23:10:41,476 INFO L125 PetriNetUnfolderBase]: For 8163/8233 co-relation queries the response was YES. [2023-11-06 23:10:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 2579 events. 1441/2579 cut-off events. For 8163/8233 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15452 event pairs, 117 based on Foata normal form. 396/2659 useless extension candidates. Maximal degree in co-relation 9948. Up to 759 conditions per place. [2023-11-06 23:10:41,503 INFO L140 encePairwiseOnDemand]: 167/174 looper letters, 155 selfloop transitions, 114 changer transitions 0/271 dead transitions. [2023-11-06 23:10:41,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 271 transitions, 2324 flow [2023-11-06 23:10:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:10:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:10:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1268 transitions. [2023-11-06 23:10:41,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5605658709106985 [2023-11-06 23:10:41,510 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1268 transitions. [2023-11-06 23:10:41,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1268 transitions. [2023-11-06 23:10:41,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:41,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1268 transitions. [2023-11-06 23:10:41,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 97.53846153846153) internal successors, (1268), 13 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:41,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:41,522 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:41,522 INFO L175 Difference]: Start difference. First operand has 47 places, 61 transitions, 508 flow. Second operand 13 states and 1268 transitions. [2023-11-06 23:10:41,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 271 transitions, 2324 flow [2023-11-06 23:10:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 271 transitions, 2323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:41,560 INFO L231 Difference]: Finished difference. Result has 69 places, 154 transitions, 2019 flow [2023-11-06 23:10:41,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2019, PETRI_PLACES=69, PETRI_TRANSITIONS=154} [2023-11-06 23:10:41,563 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-11-06 23:10:41,563 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 154 transitions, 2019 flow [2023-11-06 23:10:41,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:41,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:41,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:41,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:41,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:41,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 631178573, now seen corresponding path program 1 times [2023-11-06 23:10:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936196992] [2023-11-06 23:10:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936196992] [2023-11-06 23:10:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936196992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118267322] [2023-11-06 23:10:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:41,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:41,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:10:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:41,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:10:41,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:41,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:42,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118267322] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:42,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:42,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 8 [2023-11-06 23:10:42,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852661640] [2023-11-06 23:10:42,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:42,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:42,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:42,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 174 [2023-11-06 23:10:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 154 transitions, 2019 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 174 [2023-11-06 23:10:42,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:42,540 INFO L124 PetriNetUnfolderBase]: 1260/2268 cut-off events. [2023-11-06 23:10:42,540 INFO L125 PetriNetUnfolderBase]: For 9736/9736 co-relation queries the response was YES. [2023-11-06 23:10:42,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10249 conditions, 2268 events. 1260/2268 cut-off events. For 9736/9736 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13035 event pairs, 205 based on Foata normal form. 0/2146 useless extension candidates. Maximal degree in co-relation 10218. Up to 2081 conditions per place. [2023-11-06 23:10:42,567 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 151 selfloop transitions, 4 changer transitions 0/156 dead transitions. [2023-11-06 23:10:42,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 156 transitions, 2215 flow [2023-11-06 23:10:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:10:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-11-06 23:10:42,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129310344827587 [2023-11-06 23:10:42,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-11-06 23:10:42,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-11-06 23:10:42,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:42,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-11-06 23:10:42,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,574 INFO L175 Difference]: Start difference. First operand has 69 places, 154 transitions, 2019 flow. Second operand 4 states and 357 transitions. [2023-11-06 23:10:42,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 156 transitions, 2215 flow [2023-11-06 23:10:42,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 156 transitions, 2013 flow, removed 97 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:42,640 INFO L231 Difference]: Finished difference. Result has 72 places, 135 transitions, 1577 flow [2023-11-06 23:10:42,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1577, PETRI_PLACES=72, PETRI_TRANSITIONS=135} [2023-11-06 23:10:42,641 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-11-06 23:10:42,641 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 135 transitions, 1577 flow [2023-11-06 23:10:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:42,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:42,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:42,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:42,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:42,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash 631178574, now seen corresponding path program 1 times [2023-11-06 23:10:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:42,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388667018] [2023-11-06 23:10:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:42,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:42,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388667018] [2023-11-06 23:10:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388667018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35801773] [2023-11-06 23:10:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:42,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:42,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:42,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:42,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:10:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:42,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:10:42,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:43,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:43,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35801773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:43,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:43,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 23:10:43,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737439740] [2023-11-06 23:10:43,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:43,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:43,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:10:43,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 174 [2023-11-06 23:10:43,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 135 transitions, 1577 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:43,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 174 [2023-11-06 23:10:43,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:43,357 INFO L124 PetriNetUnfolderBase]: 898/1645 cut-off events. [2023-11-06 23:10:43,358 INFO L125 PetriNetUnfolderBase]: For 8617/8690 co-relation queries the response was YES. [2023-11-06 23:10:43,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6742 conditions, 1645 events. 898/1645 cut-off events. For 8617/8690 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9135 event pairs, 545 based on Foata normal form. 157/1753 useless extension candidates. Maximal degree in co-relation 6710. Up to 1638 conditions per place. [2023-11-06 23:10:43,376 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 101 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-06 23:10:43,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 1400 flow [2023-11-06 23:10:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-06 23:10:43,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038314176245211 [2023-11-06 23:10:43,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-06 23:10:43,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-06 23:10:43,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:43,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-06 23:10:43,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,383 INFO L175 Difference]: Start difference. First operand has 72 places, 135 transitions, 1577 flow. Second operand 3 states and 263 transitions. [2023-11-06 23:10:43,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 1400 flow [2023-11-06 23:10:43,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 1384 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:10:43,415 INFO L231 Difference]: Finished difference. Result has 70 places, 105 transitions, 1182 flow [2023-11-06 23:10:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=70, PETRI_TRANSITIONS=105} [2023-11-06 23:10:43,417 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-11-06 23:10:43,417 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 105 transitions, 1182 flow [2023-11-06 23:10:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:43,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:43,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:43,623 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:43,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 304382055, now seen corresponding path program 1 times [2023-11-06 23:10:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:43,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280185595] [2023-11-06 23:10:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:43,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280185595] [2023-11-06 23:10:43,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280185595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:43,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:43,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6820337] [2023-11-06 23:10:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:43,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 174 [2023-11-06 23:10:43,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 105 transitions, 1182 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:43,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 174 [2023-11-06 23:10:43,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:44,062 INFO L124 PetriNetUnfolderBase]: 890/1621 cut-off events. [2023-11-06 23:10:44,063 INFO L125 PetriNetUnfolderBase]: For 7725/7794 co-relation queries the response was YES. [2023-11-06 23:10:44,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 1621 events. 890/1621 cut-off events. For 7725/7794 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8871 event pairs, 403 based on Foata normal form. 69/1645 useless extension candidates. Maximal degree in co-relation 6608. Up to 1592 conditions per place. [2023-11-06 23:10:44,079 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-11-06 23:10:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 1419 flow [2023-11-06 23:10:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:10:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 336 transitions. [2023-11-06 23:10:44,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-06 23:10:44,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 336 transitions. [2023-11-06 23:10:44,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 336 transitions. [2023-11-06 23:10:44,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:44,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 336 transitions. [2023-11-06 23:10:44,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,086 INFO L175 Difference]: Start difference. First operand has 70 places, 105 transitions, 1182 flow. Second operand 4 states and 336 transitions. [2023-11-06 23:10:44,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 1419 flow [2023-11-06 23:10:44,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 110 transitions, 1418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:44,114 INFO L231 Difference]: Finished difference. Result has 72 places, 104 transitions, 1183 flow [2023-11-06 23:10:44,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1183, PETRI_PLACES=72, PETRI_TRANSITIONS=104} [2023-11-06 23:10:44,115 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-11-06 23:10:44,116 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 104 transitions, 1183 flow [2023-11-06 23:10:44,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:44,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:10:44,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:44,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -339993284, now seen corresponding path program 1 times [2023-11-06 23:10:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:44,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083886714] [2023-11-06 23:10:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:44,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083886714] [2023-11-06 23:10:44,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083886714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:44,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:44,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443762672] [2023-11-06 23:10:44,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:44,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:44,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:44,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 23:10:44,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 104 transitions, 1183 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 23:10:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:44,523 INFO L124 PetriNetUnfolderBase]: 874/1562 cut-off events. [2023-11-06 23:10:44,524 INFO L125 PetriNetUnfolderBase]: For 7098/7098 co-relation queries the response was YES. [2023-11-06 23:10:44,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6671 conditions, 1562 events. 874/1562 cut-off events. For 7098/7098 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8031 event pairs, 435 based on Foata normal form. 64/1598 useless extension candidates. Maximal degree in co-relation 6639. Up to 1390 conditions per place. [2023-11-06 23:10:44,540 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 109 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2023-11-06 23:10:44,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 124 transitions, 1623 flow [2023-11-06 23:10:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:10:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-11-06 23:10:44,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49712643678160917 [2023-11-06 23:10:44,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-11-06 23:10:44,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-11-06 23:10:44,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:44,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-11-06 23:10:44,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,548 INFO L175 Difference]: Start difference. First operand has 72 places, 104 transitions, 1183 flow. Second operand 4 states and 346 transitions. [2023-11-06 23:10:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 124 transitions, 1623 flow [2023-11-06 23:10:44,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 124 transitions, 1615 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:10:44,581 INFO L231 Difference]: Finished difference. Result has 73 places, 104 transitions, 1220 flow [2023-11-06 23:10:44,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1220, PETRI_PLACES=73, PETRI_TRANSITIONS=104} [2023-11-06 23:10:44,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-11-06 23:10:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 104 transitions, 1220 flow [2023-11-06 23:10:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:44,583 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 23:10:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:10:44,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:44,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -127471233, now seen corresponding path program 3 times [2023-11-06 23:10:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076790837] [2023-11-06 23:10:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:44,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:44,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:44,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076790837] [2023-11-06 23:10:44,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076790837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:44,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728116569] [2023-11-06 23:10:44,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:44,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:44,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:44,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:10:44,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:10:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:44,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:10:44,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:44,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728116569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:45,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 23:10:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423101604] [2023-11-06 23:10:45,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:10:45,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:10:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:10:45,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:45,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 104 transitions, 1220 flow. Second operand has 25 states, 25 states have (on average 84.16) internal successors, (2104), 25 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:45,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:45,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:45,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:46,692 INFO L124 PetriNetUnfolderBase]: 2230/4192 cut-off events. [2023-11-06 23:10:46,692 INFO L125 PetriNetUnfolderBase]: For 60954/61218 co-relation queries the response was YES. [2023-11-06 23:10:46,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 4192 events. 2230/4192 cut-off events. For 60954/61218 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 25964 event pairs, 196 based on Foata normal form. 818/4900 useless extension candidates. Maximal degree in co-relation 17072. Up to 1149 conditions per place. [2023-11-06 23:10:46,734 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 261 selfloop transitions, 242 changer transitions 0/506 dead transitions. [2023-11-06 23:10:46,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 506 transitions, 4843 flow [2023-11-06 23:10:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:10:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 23:10:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2403 transitions. [2023-11-06 23:10:46,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524137931034483 [2023-11-06 23:10:46,745 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2403 transitions. [2023-11-06 23:10:46,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2403 transitions. [2023-11-06 23:10:46,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:46,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2403 transitions. [2023-11-06 23:10:46,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 96.12) internal successors, (2403), 25 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:46,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:46,769 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:46,769 INFO L175 Difference]: Start difference. First operand has 73 places, 104 transitions, 1220 flow. Second operand 25 states and 2403 transitions. [2023-11-06 23:10:46,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 506 transitions, 4843 flow [2023-11-06 23:10:46,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 506 transitions, 4791 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:10:46,828 INFO L231 Difference]: Finished difference. Result has 116 places, 278 transitions, 4261 flow [2023-11-06 23:10:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4261, PETRI_PLACES=116, PETRI_TRANSITIONS=278} [2023-11-06 23:10:46,829 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2023-11-06 23:10:46,830 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 278 transitions, 4261 flow [2023-11-06 23:10:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.16) internal successors, (2104), 25 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:46,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:46,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:46,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:47,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:10:47,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:47,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1501242408, now seen corresponding path program 1 times [2023-11-06 23:10:47,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:47,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241187491] [2023-11-06 23:10:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:47,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:47,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:47,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241187491] [2023-11-06 23:10:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241187491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:47,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:47,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:10:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520008779] [2023-11-06 23:10:47,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:47,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 174 [2023-11-06 23:10:47,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 278 transitions, 4261 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:47,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:47,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 174 [2023-11-06 23:10:47,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:48,263 INFO L124 PetriNetUnfolderBase]: 2230/4084 cut-off events. [2023-11-06 23:10:48,263 INFO L125 PetriNetUnfolderBase]: For 38104/38372 co-relation queries the response was YES. [2023-11-06 23:10:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 4084 events. 2230/4084 cut-off events. For 38104/38372 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 24459 event pairs, 1405 based on Foata normal form. 258/4339 useless extension candidates. Maximal degree in co-relation 20266. Up to 4078 conditions per place. [2023-11-06 23:10:48,309 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 273 selfloop transitions, 1 changer transitions 0/277 dead transitions. [2023-11-06 23:10:48,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 277 transitions, 4807 flow [2023-11-06 23:10:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-06 23:10:48,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789272030651341 [2023-11-06 23:10:48,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-06 23:10:48,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-06 23:10:48,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:48,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-06 23:10:48,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:48,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:48,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:48,316 INFO L175 Difference]: Start difference. First operand has 116 places, 278 transitions, 4261 flow. Second operand 3 states and 250 transitions. [2023-11-06 23:10:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 277 transitions, 4807 flow [2023-11-06 23:10:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 277 transitions, 4490 flow, removed 151 selfloop flow, removed 2 redundant places. [2023-11-06 23:10:48,601 INFO L231 Difference]: Finished difference. Result has 115 places, 277 transitions, 3944 flow [2023-11-06 23:10:48,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3942, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3944, PETRI_PLACES=115, PETRI_TRANSITIONS=277} [2023-11-06 23:10:48,603 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2023-11-06 23:10:48,603 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 277 transitions, 3944 flow [2023-11-06 23:10:48,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:48,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:48,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:48,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 23:10:48,604 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:48,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1015678670, now seen corresponding path program 1 times [2023-11-06 23:10:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:48,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378928963] [2023-11-06 23:10:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:48,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378928963] [2023-11-06 23:10:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378928963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:48,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:10:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938807048] [2023-11-06 23:10:48,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:48,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:48,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 174 [2023-11-06 23:10:48,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 277 transitions, 3944 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:48,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:48,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 174 [2023-11-06 23:10:48,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:49,932 INFO L124 PetriNetUnfolderBase]: 2230/3975 cut-off events. [2023-11-06 23:10:49,932 INFO L125 PetriNetUnfolderBase]: For 33502/33770 co-relation queries the response was YES. [2023-11-06 23:10:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 3975 events. 2230/3975 cut-off events. For 33502/33770 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 22953 event pairs, 1405 based on Foata normal form. 367/4339 useless extension candidates. Maximal degree in co-relation 19132. Up to 3969 conditions per place. [2023-11-06 23:10:49,972 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 268 selfloop transitions, 1 changer transitions 4/276 dead transitions. [2023-11-06 23:10:49,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 276 transitions, 4488 flow [2023-11-06 23:10:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:10:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-06 23:10:49,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2023-11-06 23:10:49,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-06 23:10:49,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-06 23:10:49,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:49,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-06 23:10:49,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:49,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:49,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:49,979 INFO L175 Difference]: Start difference. First operand has 115 places, 277 transitions, 3944 flow. Second operand 3 states and 249 transitions. [2023-11-06 23:10:49,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 276 transitions, 4488 flow [2023-11-06 23:10:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 276 transitions, 4487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:50,109 INFO L231 Difference]: Finished difference. Result has 115 places, 272 transitions, 3925 flow [2023-11-06 23:10:50,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3941, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3925, PETRI_PLACES=115, PETRI_TRANSITIONS=272} [2023-11-06 23:10:50,111 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2023-11-06 23:10:50,111 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 272 transitions, 3925 flow [2023-11-06 23:10:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-06 23:10:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 23:10:50,112 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:50,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash 907053119, now seen corresponding path program 4 times [2023-11-06 23:10:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:50,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202328055] [2023-11-06 23:10:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:50,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202328055] [2023-11-06 23:10:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202328055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200954786] [2023-11-06 23:10:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:50,753 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:50,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:10:50,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:50,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 23:10:50,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:50,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:51,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200954786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:51,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-06 23:10:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754016363] [2023-11-06 23:10:51,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:51,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 23:10:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 23:10:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:10:51,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:10:51,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 272 transitions, 3925 flow. Second operand has 49 states, 49 states have (on average 84.08163265306122) internal successors, (4120), 49 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:51,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:51,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:10:51,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:56,412 INFO L124 PetriNetUnfolderBase]: 7377/12942 cut-off events. [2023-11-06 23:10:56,412 INFO L125 PetriNetUnfolderBase]: For 671083/671611 co-relation queries the response was YES. [2023-11-06 23:10:56,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55122 conditions, 12942 events. 7377/12942 cut-off events. For 671083/671611 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 83314 event pairs, 734 based on Foata normal form. 1706/14647 useless extension candidates. Maximal degree in co-relation 55066. Up to 3737 conditions per place. [2023-11-06 23:10:56,573 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 215 selfloop transitions, 882 changer transitions 138/1238 dead transitions. [2023-11-06 23:10:56,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1238 transitions, 14474 flow [2023-11-06 23:10:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 23:10:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 23:10:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4590 transitions. [2023-11-06 23:10:56,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383532723434201 [2023-11-06 23:10:56,589 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4590 transitions. [2023-11-06 23:10:56,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4590 transitions. [2023-11-06 23:10:56,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:56,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4590 transitions. [2023-11-06 23:10:56,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 93.6734693877551) internal successors, (4590), 49 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 174.0) internal successors, (8700), 50 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,630 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 174.0) internal successors, (8700), 50 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,631 INFO L175 Difference]: Start difference. First operand has 115 places, 272 transitions, 3925 flow. Second operand 49 states and 4590 transitions. [2023-11-06 23:10:56,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1238 transitions, 14474 flow [2023-11-06 23:10:57,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 1238 transitions, 14473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:10:57,052 INFO L231 Difference]: Finished difference. Result has 207 places, 914 transitions, 14887 flow [2023-11-06 23:10:57,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14887, PETRI_PLACES=207, PETRI_TRANSITIONS=914} [2023-11-06 23:10:57,053 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-11-06 23:10:57,053 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 914 transitions, 14887 flow [2023-11-06 23:10:57,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 84.08163265306122) internal successors, (4120), 49 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:57,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:57,056 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-06 23:10:57,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:10:57,262 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:10:57,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1783584191, now seen corresponding path program 5 times [2023-11-06 23:10:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:57,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206964778] [2023-11-06 23:10:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:59,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206964778] [2023-11-06 23:10:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206964778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905051083] [2023-11-06 23:10:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:10:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:59,330 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:59,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:10:59,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 23:10:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:59,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 23:10:59,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:59,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:02,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905051083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:02,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:02,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-06 23:11:02,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65388174] [2023-11-06 23:11:02,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:02,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-06 23:11:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-06 23:11:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 23:11:02,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:11:02,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 914 transitions, 14887 flow. Second operand has 97 states, 97 states have (on average 84.04123711340206) internal successors, (8152), 97 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:02,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:02,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:11:02,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:30,032 INFO L124 PetriNetUnfolderBase]: 27105/47514 cut-off events. [2023-11-06 23:11:30,032 INFO L125 PetriNetUnfolderBase]: For 7242513/7243617 co-relation queries the response was YES. [2023-11-06 23:11:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224287 conditions, 47514 events. 27105/47514 cut-off events. For 7242513/7243617 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 345466 event pairs, 3078 based on Foata normal form. 3530/51043 useless extension candidates. Maximal degree in co-relation 224184. Up to 13697 conditions per place. [2023-11-06 23:11:30,755 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 409 selfloop transitions, 3322 changer transitions 282/4016 dead transitions. [2023-11-06 23:11:30,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 4016 transitions, 59802 flow [2023-11-06 23:11:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-06 23:11:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-06 23:11:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9102 transitions. [2023-11-06 23:11:30,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392819054390331 [2023-11-06 23:11:30,784 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9102 transitions. [2023-11-06 23:11:30,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9102 transitions. [2023-11-06 23:11:30,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:30,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9102 transitions. [2023-11-06 23:11:30,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 93.83505154639175) internal successors, (9102), 97 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:30,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 174.0) internal successors, (17052), 98 states have internal predecessors, (17052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:30,854 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 174.0) internal successors, (17052), 98 states have internal predecessors, (17052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:30,854 INFO L175 Difference]: Start difference. First operand has 207 places, 914 transitions, 14887 flow. Second operand 97 states and 9102 transitions. [2023-11-06 23:11:30,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 4016 transitions, 59802 flow [2023-11-06 23:11:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 4016 transitions, 50774 flow, removed 4326 selfloop flow, removed 11 redundant places. [2023-11-06 23:11:35,968 INFO L231 Difference]: Finished difference. Result has 386 places, 3356 transitions, 54720 flow [2023-11-06 23:11:35,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=13825, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=54720, PETRI_PLACES=386, PETRI_TRANSITIONS=3356} [2023-11-06 23:11:35,969 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 357 predicate places. [2023-11-06 23:11:35,970 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 3356 transitions, 54720 flow [2023-11-06 23:11:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 84.04123711340206) internal successors, (8152), 97 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:35,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:35,972 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-11-06 23:11:35,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:36,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:11:36,179 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:11:36,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2142990527, now seen corresponding path program 6 times [2023-11-06 23:11:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138522918] [2023-11-06 23:11:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:42,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138522918] [2023-11-06 23:11:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138522918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550299746] [2023-11-06 23:11:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:11:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:42,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c9a7df-b04c-49a8-b554-f110e9916a0e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:11:43,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-11-06 23:11:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:43,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 23:11:43,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:43,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550299746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:54,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-11-06 23:11:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044093121] [2023-11-06 23:11:54,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:54,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-06 23:11:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-06 23:11:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-06 23:11:55,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2023-11-06 23:11:55,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 3356 transitions, 54720 flow. Second operand has 193 states, 193 states have (on average 84.02072538860104) internal successors, (16216), 193 states have internal predecessors, (16216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:55,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:55,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2023-11-06 23:11:55,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand